2024 Presenter Biographies

Presenter biographies are sorted by name.

Mst Rowshon Afroz

PhD Student, Environmental and Atmospheric Chemistry, Department of Chemistry, University of Alberta


Ajit Ahlawat

Research Scientist, Leibniz Institute for Tropospheric Research

I am working in the field of air quality and aerosol instrumentation for more than 8 years. I have a specific interest in using low-cost sensors and portable aerosol instruments on-board drones.

Dheeraj Alshetty

Advisor Air Quality Scientist, India, Environmental Defense Fund


Kofi Amegah

Associate Professor, University of Cape Coast


Abhishek Anand

PhD Student, Carnegie Mellon University


Sigride Asseko

Oregon State University


Chethani Athukorala

Graduate student, Clarkson University, NY

Chethani Athukorala is a PhD candidate at Clarkson University, specializing in aerosol science. Her thesis is towards predicting infection risk from airborne particles in indoor environments. She is studying the fate and transport of indoor airborne particles depending on the ventilation conditions and the nature of space usage.

Aynul Bari

Assistant Professor, University at Albany, State University of New York


Karoline Barkjohn

Physical Scientist, United States Environmental Protection Agency

Karoline Barkjohn is a Physical Scientist in EPA’s Office of Research and Development in Research Triangle Park, North Carolina. Her research focuses on the evaluation and improvement of air sensor performance across the United States. In 2018 she received her Ph.D. in environmental engineering from Duke University. Karoline also holds master’s and bachelor’s degrees in environmental engineering from Georgia Tech and NC State University, respectively.

Douglas Booker

Co-Founder & CEO, NAQTS / Lancaster University

Douglas Booker is Co-Founder & CEO of NAQTS, a business with a mission to provide holistic indoor air quality information using its high-quality air pollution monitoring technology to inform choices and improve quality of life.

Douglas also holds a PhD from Lancaster University, where he combined the doing of air quality science (including a nationwide schools indoor air quality monitoring campaign, and a citizen science project), with a critical reflection on how air quality knowledge is produced, and its implications for claims of  environmental justice.

Alex Cabral

Microsoft Research

Alex Cabral is a final year PhD student in Computer Science at Harvard University graduating in May 2024. From 2020 to 2022, she was a member of the Urban Innovation group at Microsoft Research, where she helped deploy and maintain the Eclipse air quality sensing network. Her research is focused on designing reliable, scalable, and equitable sensor networks for urban environmental sensing.

Jonathan Callahan

Associate Research Professor, Desert Research Institute


Francesco Cappelluti

Consultant, Danish Technological Institute

Dr. Francesco Cappelluti has a Master in Chemistry from "La Sapienza" University in Rome and a Ph.D. in Mathematical Modelling and Computational Chemistry from L'Aquila University (Italy). After a short period as postdoc at Aarhus University, he joined Danish Technological Institute, working as consultant in the "Air and Sensor Technology center". His interests cover the gases and particle monitoring, both indoor and outdoor, the development and test  of air quality sensors and data analysis.

George Castelar

Head of the Air Quality Department, Metropolitan Municipality of Lima

Environmental engineer focus on low-cost sensors and associations with health

Nuria Castell

Senior Scientist, NILU

Nuria Castell, Senior Scientist at NILU, is the coordinator of the Technology and Society group, leading national and international research projects focused on the uptake and validation of novel sensor technologies and the integration of citizen observations in policy and research. She is currently coordinating the Horizon Europe CitiObs project, aiming at enhancing Citizen Observatories in 85 cities in Europe. Nuria’s academic pursuits encompass a wide-ranging spectrum of fields, including sustainable urban development, citizen science, environmental governance, planetary health, urban living labs experimentation and the intersection of science and art. Nuria also holds the position of co-chair of the Citizen Science Global Partnership and the European Citizen Science Association's working group on air quality. 

Jose Guillermo Cedeño Laurent

Rutgers University


Miriam Chacón Mateos

Research Scientist, University of Stuttgart

Miriam Chacón Mateos is a research scientist at the Department of Flue Gas Cleaning and Air Quality Control at the University of Stuttgart in Germany. 

Her ongoing doctoral work focuses on the investigation of air quality sensors for their application in epidemiological studies. She conducted a feasibility study together with the University Hospital Charité in Berlin with patients with COPD (chronic obstructive pulmonary disease) and asthma. She is also one of the authors of the Handbook “Sensors for measuring air pollutants: possibilities and limits as well as advice on their use” published by the German Environment Agency in German. Other projects that she has successfully completed include understanding the impact of road traffic in the air quality of the classrooms in a public school and the European project “Integrated Climate forcing and Air pollution Reduction in Urban Systems” (https://icarus2020.eu/).

She holds a B.Eng. in Chemical Engineering from the Complutense University of Madrid (Spain), and a M.Sc. in Air Quality Control, Solid Waste and Waste Water Process Engineering from the University of Stuttgart (Germany).

Zoe Chafe

Programme Manager, C40

Dr. Zoë Chafe is Technical Lead for Air Quality at C40 Cities, where she empowers individuals, organizations and communities with the data and strategy needed to build an equitable, safe, and healthy future. Zoe leads C40's air quality data & analytics team, technical assistance programs, and regional air quality programs, including African Cities for Clean Air. 

Zoë specializes in integrating air quality & climate action, with a focus on benefits to public health.  She holds a PhD (Energy and Resources) and MPH (Master of Public Health) from the University of California, Berkeley, as well as a bachelor’s degree from Stanford University. She has collaborated with the Intergovernmental Panel on Climate Change (IPCC), Global Burden of Disease studies, the Global Energy Assessment, and the World Health Organization. Her work on household energy, air pollution, climate, and health has been supported by the National Science Foundation Graduate Research Fellowship, the Young Scientists Summer Program at the International Institute for Applied Systems Analysis (IIASA), and the Atkinson Postdoctoral Fellowship in Sustainability at Cornell University. 

Mayra Chavez

Visiting Professor, University of Texas at El Paso

Dr. Mayra Chavez is currently working in the Civil Engineering Department at the University of Texas at El Paso as a visiting Professor with a focus on research in Air Quality. She has earned a Doctoral Engineering degree in Civil Engineering and continued her research through a postdoctoral research fellowship. As a visiting professor, she has worked in conjunction with other researchers in environmental sciences, health sciences, and education. She has also supervised the dissertation and thesis work of five students, working on their committees and guiding them throughout their research years. Her research expertise is in traffic-related air pollution, mobile air monitoring, air dispersion modeling, and air pollution monitoring. She has also led several studies on mobile air pollution monitoring in El Paso, Texas. Many of these studies involve work across the Mexican border or work in the underserved communities of El Paso, Texas. Her experience in air quality monitoring has led her to work on projects in Texas and Chihuahua, Mexico, where she participates in scientific research as well as community engagement.

Christi Chester Schroeder

Air Quality Science Manager, IQAir

Christi is the Air Quality Science Manager at IQAir North America. IQAir is a Swiss-based air quality technology company, sensor manufacturer and global, real-time data aggregator. Christi holds a Ph.D. in physical chemistry from the University of Southern California and has more than 10 years of air quality experience spanning positions in the regulatory community, academia, and the private sector. She brings a diverse background and comprehensive perspective to her position at IQAir where she provides scientific guidance to support multinational, cross functional teams whose projects scope the entire air quality data pipeline from data generation and cloud data processing to multi-platform data access and visualization.

Andrea Clements

Physical Scientist, U.S. EPA

Andrea L Clements, Ph.D. is a research physical scientist with the U.S. Environmental Protection Agency’s Office of Research and Development, located in Research Triangle Park, North Carolina. Andrea leads efforts to evaluate sensor performance, test the usability of sensors for a variety of applications, summarizes best practices, and develop resources that educate and guide others in the most effective use of sensors and the data they produce. She holds a Ph.D. in Civil and Environmental Engineering from Rice University in Houston, Texas and also has degrees in Environmental Science and Engineering (M.S. Caltech), Chemical Engineering (B.S. Washington University in St. Louis), and Mathematics (B.A. Cornell College).

Evan Coffey

Sr. PRA, University of Colorado Boulder

Ashley Collier-Oxandale

ATOPS Data & QA Unit Supervisor, Colorado Department of Public Health & Environment APCD

Dr. Ashley Collier-Oxandale is a Physical Science Researcher in the Air Toxics and Ozone Precursors Section (ATOPS) at the Colorado Department of Public Health and Environment. Her work includes building a cloud database to store and process data from a range of measurements, including sensors, and supporting the integration of sensors into ATOPS operations. Dr. Collier-Oxandale received her Doctor of Philosophy in Environmental Engineering degree from the University of Colorado Boulder.

Ben Crawford

Assistant Professor, University of Colorado Denver

Ben is a Professor in the Geography and Environmental Sciences Department at the University of Colorado Denver. Before coming to Colorado in 2019, Ben was a postdoc at MIT and the University of Reading (UK); worked for a wind energy start-up; and completed his PhD at the University of British Columbia. His background is in micrometeorology and current research interests are focused on air quality, cities, volcanoes, and developing sensor networks to observe complex surface-atmosphere interactions.

Manish Desai

Research Fellow, Department of Policy & Ethics, School of Medicine, University of Pennsylvania, Philadelphia, PA, USA

An environmental health scientist by training, Manish Desai’s expertise encompasses household energy, climate change, and infectious disease. Manish’s research seeks to help optimize the implementation of interventions with coverage-dependent benefits, focusing, in recent years, on the promising efforts to encourage clean cooking in South Asia. Manish draws on a variety of methods - field measurements, economic experiments, qualitative surveys, spatial analyses, and mechanistic models - to inform policy and practice at the intersection of public health and environmental science.

Priyanka deSouza

Assistant Professor, University of Colorado Denver

Priyanka deSouza is an Assistant Professor at the Department of Urban and Regional Planning at the University of Colorado Denver where she probes different ways of understanding air pollution and its effects. Before starting at CU Denver, Priyanka obtained a Ph.D. in Urban Studies and Planning from the Massachusetts Institute of Technology. She read for an MSc in Environmental Change and Management and an MBA at the University of Oxford where she studied as a Rhodes Scholar. Priyanka has a Bachelor and Master of Technology in Energy Engineering from the Indian Institute of Technology Bombay. She has worked as a consultant for the World Health Organization, UN Environment, and Project Drawdown.

Savannah D'Evelyn

Postdoctoral Scholar, University of Washington


Swagata Dey

Program Project Manager, Environmental Defense Fund


Sebastian Diez

Researcher, Universidad del Desarrollo

Sebastian is currently Researcher at the C+ Research Center (Universidad del Desarrollo, Chile) and Visiting Research Associate at WAC (University of York). During his PhD training, he has developed experience in field trace gases and aerosol measurements, and more recently in low-cost sensor and satellite products. After his doctoral studies, he has been involved with regional NGOs and local governments working on climate change and air quality projects. He is currently member of the Latin America Early Career Earth System Scientist Network (LAECESS) and editor of Nibö, a digital media whose objective is to socialise scientific knowledge in LatAm.

John Downie

Technical Business Development Manager, Environmental Instrument

John Downie has spent the last three years immersed in small sensor air quality applications around the world. As the main point of contact for a small sensor system manufacturer, he has been involved in a wide range of projects, including community air quality monitoring. From initial discussion, suitability, and specification, supports users through project design, installation of monitoring equipment, data quality assurance, maintenance and all aspects of the project life cycle.

Before taking up the role of Technical Business Development Manager for Environmental Instruments, the UK-based manufacturer of the small sensor system AQMesh, John’s experience was in user support, and he continues to focus on customer requirements to deliver practical solutions.

John plays a significant role within the AQMesh team, which has been developing the product since it was first used 12 years ago. He is closely involved in product development, understanding the advances offered by continual improvements in technology and data management, as well as the limitations of small sensor systems, in different applications and conditions.

Tim Dye

President, TD Enviro

Tim Dye is a visionary and entrepreneur, he has created air quality and meteorological applications both domestically and internationally. He is a widely recognized leader in air sensors and Internet of Things (IoT) technologies for environmental applications. Tim has the proven ability to transform traditional programs by using a mixture of technology, creativity, and leadership.

Scott Epstein

South Coast Air Quality Management District

Dr. Scott Epstein is the Program Supervisor of the Air Quality Assessment Group at the South Coast Air Quality Management District. His group specializes in the analysis, interpretation, and dissemination of air quality and meteorological data to help the public reduce their exposure to poor air quality. Scott joined the South Coast AQMD in 2014 after a postdoc in Atmospheric Chemistry at the University of California, Irvine. He has a Ph.D. in Chemical Engineering from the Center for Atmospheric Particle Studies at Carnegie Mellon University.

Miguel Escribano

Business Development Director, BETTAIR CITIES & DNOTA

Miguel Escribano is the Director of Business Development at Bettair, specialized on projects involving the development of greentech and the design and execution of go-to-market strategies of IoT, AI, wireless sensor systems and networks; including environmental software and its related services. And using his knowledge promotes partnerships that accelerate the standardization and fast adoption of sensor-based systems throughout different use cases; fostering the digital the transformation of environmental and climate change management; and a more sustainable development of cities, polluting industries, and infrastructures.

Before joining Bettair, he coordinated the Clean Air Project by World Athletics and led the growth of companies in the domain of sensor-based systems, environmental software,  nuisance monitoring and AI-based situational intelligence. 

He is recipient of an honorable mention by the 2018 US EPA Wildland Fire Sensors Challenge. And has been two times member of teams recognized with the award for most accurate sensor system at the Airlab Challenge, recently in 2023 awarded to Bettair. 

He is member of the standarization group CEN/TC264/WG42 for Gas Sensors (European technical specification CEN/TS 17660-1:2021 - Air Quality-Performance evaluation of air quality sensors). And member of the group CEN/TC264/WG41 for Instrumental odour monitoring systems (IOMS).

Ron Evans

Senior Analyst, US Environmental Protection Agency

Ron Evans has been with the U.S. Environmental Protection Agency for over 40 years with experience in several different programs.   Over the past 5 years he has helped co-lead USEPA Office of Air and Radiation efforts to understand the potential for air sensor technology to help better understand and communicate air quality.  In May 2020 he became the EPA point of contact for the joint USEPA & US Forest Service AirNow Fire and Smoke Map which utilizes permanent air quality monitors and low cost sensors to provide the public with high quality information about their air quality.

Javier Fernandez

CEO, Kunak Technologies

Javier Fernández Huerta is a telecommunications engineer and founding partner of Kunak, a company that offers a system for environmental monitoring and air quality control. Javier is firmly committed to innovation and has an optimistic vision of the future thanks to the role that technology will play in improving people's lives.

Valerio Ferracci

Senior Scientist, National Physical Laboratory


Nancy Fitzgerald

Denver Department of Public Health and Environment


Caroline Frischmon

Graduate Student, University of Colorado Boulder

Caroline Frischmon is a Ph.D. graduate student at the University of Colorado - Boulder. She works with communities impacted by the oil and gas industry in Los Angeles, CA and Pascagoula, MS to support their environmental justice advocacy through low-cost air quality monitoring.

Karen Grzywinksi

Allegheny County Clean Air Now (ACCAN)

Co-founder ACCAN. Advocate in SW PA for better regulation of industrial pollution.

Raiford Hann

Air Resources Engineer


Michael Hannigan

University of Colorado Boulder


Tajanae Harris

Summer 2023 Intern, OpenA


Amirhossein Hassani

Senior Scientist, The climate and environmental research institute NILU


Dennis Heidner


Stig Hellebust

Lecturer, University College Cork


Detlev Helmig

Principal, Boulder AIR


Geoff Henshaw



Susanne Hering

Senior Research Scientist, Aerosol Dynamics Inc.

Susanne Hering is the founder of Aerosol Dynamics Inc., a small R&D company dedicated to the characterization of airborne particles.  Her firm has developed multiple instrumental techniques for characterizing airborne particles, including water-based condensation particle counters and collectors for characterizing ultrafine particles and a compact mobility analyzer for fine particle sizing. She holds a PhD in Physics and was introduced to the field of atmospheric aerosols through postdoctoral work at Caltech. 

Scott Hersey

Associate Professor and Air Partners Lead, Air Partners & Olin College

Dr. Hersey joined Olin College of Engineering in 2015 from South Africa, where he worked with scientists, engineers, government ministers, NGOs, and local communities to develop effective and health-driven pollution offset programs aimed at improving air quality in townships and informal settlements.

He concurrently co-founded and managed a social enterprise business called Jozi’s Nut Butters, and subsequently transferred business ownership to a community-owned trust. Prior to his work in South Africa, Dr. Hersey served as Adjunct Assistant Professor in both Engineering and Chemistry at Harvey Mudd College, where he developed a passion for effective and innovative undergraduate education. He holds a B.S. in Ecology and Evolutionary Biology and B.A. in Civil and Environmental Engineering from Rice University, and an M.S. and Ph.D. in Environmental Science and Engineering from the California Institute of Technology. His Ph.D. dissertation focused on the chemical composition of aerosol particles and their impact on urban air quality, cloud microphysics, and climate.

At Olin College, Dr. Hersey advises student teams in both capstone programs (SCOPE and Affordable Design and Entrepreneurship), in addition to teaching User Oriented Collaborative Design (UOCD) and developing project-based courses in Environmental Analysis and Engineering. His research interests unite community-driven design with scientific research to build local capacity for improving air quality. Through strong community partnerships, robust technical capabilities, and a mission based on asset-based community development, Dr. Hersey’s Air Partners Group tackles projects including low-cost sensor development and validation (chemistry, electrical and computer engineering), democratizing air quality data (software development, data science), improving access to in-home air quality interventions (environmental engineering, social entrepreneurship), and supporting the legislative process to safeguard air health in near-airport. Learn more about Air Partners at https://www.airpartners.org/our-work.

Collins Gameli Hodoli

Postdoctoral Research Associate, University of Georgia, Athens

Collins is a lecturer at the University of Environment and Sustainable Development in Ghana and the Founder and Director of Operations at Clean Air One Atmosphere - a nonprofit using air sensors to revolutionize air quality monitoring and data communication in Ghana and Wider Africa. He received his PhD from Cranfield University in the UK and then returned to Ghana to apply his expertise close to home. He has secured a number of international collaborations with Global North experts. In particular, he is a member of CAMS-Net (a “network of networks” for air quality), National Science Foundation Funded group led by Prof Daniel M. Westervelt of Columbia University, USA. Through this project, Collins was one of a few network members to receive seed funds for small air quality research projects. His project aims to understand PM2.5 exposure using well-calibrated low-cost sensors in agricultural settings in Ghana. He is also involved in another CAMS-Net project involving PM2.5 exposure in schools in the Ashanti region of Ghana. Generally, Collins collaborated with Global North experts on ground-breaking air pollution research and capacity building in West Africa towards air pollution management and control. Collins is an emerging leader in the field of African air pollution exposure. In addition to his scientific research accomplishments, he is also passionate about environmental activism in his home country and is leading the fight for cleaner air for all Ghanaians.

Jelle Hofman

R&D Researcher


Arón Jazcilevich

Researcher, Universidad Nacional Autónoma de México

B. Sc. Computer Engineering at the Engineering School, National University of Mexico
M. Sc. Communication and Control, Stony Brook University, NY, USA
M. Sc. Applied Mathematics, Stony Brook University, NY, USA
Ph.D. Applied Mathematics, Stony Brook University, NY, USA

He is currently a Senior Researcher at the Center for Atmospheric Sciences and Climatic Change of the UNAM. His lines of research include the modeling of air quality, the effect of vehicular emissions on the atmosphere and personal exposure to pollution. He is also interested in energy use in public and private transport. On these topics he has published more than 40 articles in indexed journals and directed projects funded by CONACYT, Mexico City Science Council, University of California, GEF, among others.

Katie Kearns

Technical Director, Berkeley Air Monitoring Group

Katie Kearns, Ph.D., is a Research Scientist at Berkeley Air Monitoring Group. She brings seven years of experience working on air quality and exposure studies, including for the NIH-funded Household Air Pollution Intervention Network trial (HAPIN), which is the largest randomized controlled trial looking at the health impacts of transitioning from biomass to gas stoves. As part of her work for the HAPIN trial, she led the study to characterize how NO2 concentrations and exposures were impacted by the energy transition. Dr. Kearns’s work focuses on implementing quality assurance and quality control measures in a variety of household energy intervention studies and characterizing exposures to harmful air pollutants, particularly in low- and middle-income countries and disadvantaged populations in the U.S. Dr. Kearns has a Ph.D. and a B.S. in Environmental Health Science from the University of Georgia and is fluent in Spanish.

Kerry Kelly

Associate Professor, University of Utah, University of Utah

Dr. Kerry Kelly is a professional engineer and an Associate Professor of Chemical Engineering at the University of Utah. Her research focuses on understanding the connections between energy, air quality and health. More recently, she has focused on using cost-effective, air-quality sensing to understand local-scale, air quality challenges. She served 8 years on Utah’s Air Quality Board and currently serves on the state’s air quality policy board.

Daniel King

Geospatial Data Scientist, Sonoma Technology, Inc.


Xiaobi (Michelle) Kuang

Air Quality Specialist, South Coast AQMD

Dr. Michelle Kuang is an Air Quality Specialist in the Monitoring & Analysis Division of South Coast AQMD. She is responsible for chamber test method development, design and execution of laboratory chamber experiments, data analysis, and development of laboratory and field sensor performance evaluation reports. Dr. Kuang received her Bachelor of Science degree in Chemistry from University of California, San Diego, and her Doctor of Philosophy degree in Atmospheric Science from University of California, Los Angeles.

Shwetha Sunil Kumar

PhD Student, Carnegie Mellon University

Shwetha Kumar is a PhD student working with Professor Albert Presto and Professor Reeja Jayan in the Department of Mechanical Engineering at Carnegie Mellon University (CMU). Her research at CMU focuses on the development of low-cost chemiresistive sensors to detect and quantify the concentration of volatile organic compounds (VOCs). Currently, she is working on developing hybrid inorganic sensors for detection of formaldehyde with a focus on encapsulation techniques to improve the lifetime of these sensors.

Prior to joining CMU, she received her BTech (Honors) in Production Engineering from National Institute of Technology Tiruchirappalli (NITT), India.

Gulshan Kumar

Senior Research Scholar, Indian Institute of Technology Delhi, India

Passionate about Low-Cost Air Pollution Sensors! On a mission to decode pollution patterns and democratize access to data for communities worldwide. Let's collaborate to empower individuals, drive sustainable choices, and advocate for a cleaner, brighter future. Join me in the quest for cleaner air for all!

Menaka Kumar

Data Analyst, National Student Services Contract, hosted by the U.S. Environmental Protection Agency, Office of Research and Development


Randy Lam

Air Quality Specialist, South Coast AQMD

Mr. Randy Lam is an Air Quality Specialist in the Monitoring & Analysis Division of South Coast AQMD. He specializes in community monitoring and environmental justice initiatives involving the use of air quality sensors, sensor network management, and outreach/education with the public on air quality. He is also involved in the field testing of air quality sensors and has previously worked in the Monitoring Network group at South Coast AQMD. Mr. Lam received his Bachelor of Science in Biological Sciences and his Master of Arts in Teaching degrees from the University of California, Irvine. Prior to joining South Coast AQMD, Mr. Lam was a high school science teacher and has taught courses in biology, earth science, oceanography and forensics.

Janice Lam Snyder

Program Manager, Sacramento Metropolitan Air Quality Management District

Janice Lam Snyder is the Director of Community Air Protection for the Sacramento Metropolitan Air Quality Management District where she provides technical and strategic policy direction for the District’s environmental justice program, air monitoring, federal and state planning, rule development, and emission inventory programs. Her career started with U.C. Davis’ Crocker Nuclear Laboratory where she helped to develop scientific methods for analyzing air filters – now, she helps to shape policy to improve regional and community-level air pollution. For the District’s first scientific study on wood smoke from toxics in environmental justice communities, she served as the Principal Investigator (PI); she also serves as the PI for the District’s current efforts to study mobile source toxics in underserved communities. Janice has served as a Subject Matter Expert (SME) for the US EPA for PM sensors. She has over 18 years of experience working in air quality and environmental policy and has been involved in a range of issues such as tree planting, wood burning curtailments, climate change, air quality monitoring, community engagement, and environmental justice.  Janice received her B.S. in Applied Physics from U.C. Davis and received her M.S. in Environmental Planning and Management from Johns Hopkins University. 

Jiayu Li

Universty of Miami

Jiayu graduated received her BS from Environmental School at Tsinghua University and Ph.D. from the Department of Energy, Environmental, and Chemical Engineering at Washington University in St. Louis. She then continued her research at Carnegie Mellon University. Her research mainly focuses on air quality sensors, including PM sensors and gas sensors. She tries to enhance the accuracy of these sensors through comprehensive calibration and advanced algorithms. Then, these sensors have great potential for pollution mapping with high spatiotemporal resolution. 

Zeyu Li

PhD candidate, University of Michigan

Li's research focus is utilizing MEMS Technology to improve air quality sensing. Recent works include novel PM sensors and gas sensors.

Zhiyuan Li

Associate Professor, Sun Yat-sen University


Jackline Lidubwi

Program Coordinator, Internews Network

Jackline Lidubwi is a multi-award-winning communications professional whose career in journalism, media training and management across public and non-governmental sectors spans over 20 years. 
Jackline works as the Project Coordinator of Clean Air Catalyst in Nairobi for Internews Earth Journalism Network, previously she was the Project Lead for the Inclusive Media Project at Internews where she trained journalists on the inclusion and participation of Persons with Disabilities in media in Sub-Saharan Africa specifically in Tanzania, Kenya, Liberia, DRC and Cote d’Ivoire. 

She was the Head of Station at Y254 television and Senior Producer at Kenya Broadcasting Corporation where she founded “Abled Differently” which is the first disability specific program in Kenya. She also worked in academia as an adjunct lecturer at the University of Nairobi, St. Paul’s University, and the Kenya Institute of Mass Communication.

Jackline was a 2017 American Disability Act (ADA) fellow at The University of Massachusetts and a Global Change Leader trained at the renowned Coady International Institute in Canada. 

She won several media awards which include the Disability Mainstreaming Award for 2017, Annual Disability Rights and Advocacy Award (ADARA) as a Media Activist for Persons with Disabilities in 2014 and UNFPA/KEMEP Award (2013) as Best Television Producer in the Female Genital Mutilation category.

She is passionate about social justice and has published widely on disability, inclusion and the media. Her most recent publication is a book chapter in Disability and Social Justice in Kenya: Scholars, Policymakers, and Activists in Conversation. She champions for women rights, disability rights and the inclusion of the marginalized through her YouTube channel. She regularly speaks on women rights and disability inclusion at local and international conferences.

Jackline has completed her doctoral thesis, which is currently under review by the dissertation committee at Jomo Kenyatta University of Technology.  She holds a Master of Arts degree in Communication Studies from the University of Nairobi, a Bachelor of Arts degree in Communication studies from St Paul’s University, and a Diploma in Mass Communication from the Kenya Institute of Mass Communication. She received training in Media Campaigns for Social Change and Development at Radio Netherlands Training Centre in 2017.

Wayne Linklater

Professor and Chair, Dept. of Environmental Studies, California State University - Sacramento


Isaac Lino

Air Resources Engineer, California Air Resources Board

Outside work, I enjoy chess and biking while restoring a 1995 Jaguar and pursuing a private pilot certification. Professionally, I'm an Air Resources Engineer at the California Air Resources Board (CARB), with a background in Computer Science and Computer Engineering from the University of California, Riverside (UCR). Additionally, I developed a low-cost PM monitor based on scatter laser technology, which is currently patent pending.

At CARB, I lead Remote Emission Monitoring Device (REMD) projects to detect high-emitting heavy-duty vehicles, coordinate mobile deployment checkpoints, and maintain PEAQS equipment across Southern California. I designed a Mobile Deployment Platform integrating analyzers to detect NOx, CO2, and Black Carbon emissions. I liaise with California agencies such as the California Department of Food and Agriculture (CDFA), California Highway Patrol (CHP), and Port of Long Beach (POLB) for emissions data collection from Heavy-Duty trucks. I develop SQL queries and Python scripts and contribute to PEAQS Software in-house design.

Beyond CARB, I contributed to research at UCR's College of Engineering Center for Environmental Research and Technology (CE-CERT) and College of Natural and Agricultural Sciences (CNAS) of UCR, focusing on Low-Cost PM monitors and collaborating with JPL/NASA. My Engineering background and innovation drive my commitment to supporting environmental regulations and emissions data analysis for a greener future.

Hang Liu

Staff Air Pollution Specialist, CARB


Solomon Lomotey


A Space Geophysicist with an enthusiasm for Space Science, who is dedicated to lifelong learning and professional development, and has a genuine interest in improving the quality of Space Science Education, Atmospheric Sciences and related topics. 

Ian Longley

Principal Scientist, NIWA


Tianjun Lu

Assistant Professor, University of Kentucky; California State University, Dominguez Hills

Tianjun (Luke) is an Assistant Professor in the Department of Epidemiology and Environmental Health. Before joining the University of Kentucky, he was an Assistant Professor in the Department of Earth Science and Geography at the California State University, Dominguez Hills and a research scientist in the Department of Civil and Environmental Engineering at the University of Washington. Based on his multidisciplinary training and experience, his research centers on the intersection of urban planning, exposure assessment, and environmental health. He uses sensor technologies, geospatial techniques, and community engagement to develop health-promoting communities. To date, his scholarly contribution falls into three areas: (1) conducting national, regional, and local air quality monitoring and modeling, (2) assessing the built environment’s impact on air quality, and (3) promoting healthy human mobility (e.g., tracking physical activity and measuring telecommuting patterns). His work has been applied in epidemiological studies as well. Notably, Luke has conducted community air monitoring programs using low-cost sensing and mobile monitoring and evaluated community mobility challenges across disadvantaged communities in California. One of his overarching research goals is to improve environmental health, inform intervention strategies, and promote environmental and mobility justice.

Boris Lukanov

PSE Richmond


Megan MacDonald


Tristalee Mangin

Research Assistant, University of Utah Chemical Engineering


Lovanomenjanahary Marline

Post doctoral fellow, Association Vahatra

Postdoctoral researcher from Madagascar. 

I am a passionate about bryophytes (mosses), island biodiversity and tropical mountain systems. I investigate (1) the ecological and evolutionary processes that determine bryophyte diversity and distribution pattern at local, landscape and biogeographic scale and (2) to understand the effect of climate change on biodiversity and (3) the importance of mosses as bioindicators of biodiversity, air quality and climate change.

Heather McIntyre

Physical Sciences Researcher/Scientist II, CDPHE APCD ATOPS OMM


Ethan McMahon

President, EM Environmental Solutions

Ethan McMahon is the Chief of Party of the Clean Air Catalyst, a program launched by the U.S. Agency for International Development and a global consortium of organizations led by the World Resources Institute and the Environmental Defense Fund. The Catalyst is piloting an innovative data-to-impact methodology in three cities: Indore, India; Jakarta, Indonesia; and Nairobi, Kenya. Previously, Ethan was a Senior Innovation Advisor at the U.S. Environmental Protection Agency where he launched EPA’s Smart City Air Challenge so communities could install hundreds of air quality sensors and make the data public. Ethan also managed NASA’s International Space Apps Challenge in 2014, a global hackathon in 95 locations that yielded over 660 projects. In addition, he managed EPA’s Apps for the Environment Challenge in 2011, which encouraged developers to create mobile apps using EPA’s open data.

Sebastian Meledina

Environmental Specialist I, New Jersey Department of Environmental Protection Bureau of Air Monitoring

I am an Environmental Specialist at NJDEP who works for Ambient Air Monitoring performing QA/QC activities and community monitoring projects. Currently assists in a local air quality community project in Trenton, NJ using Purple Air sensors. Developed an open-source R shiny application to process locally harvested SD card into one file for easy comparison to reference Air Monitors in the States network. Graduated from NJIT with a B.S. in Environmental Science.    

Emilio Molina Rueda

Research Assistant, Colorado State University

During my education and research experience I have accumulated multiple skills and hands-on knowledge required to contribute to the research and development process, from the design of the technology to field and laboratory evaluation. After receiving my bachelor’s degree in Mechanical Engineering in 2018, I worked for two years managing three NIH-funded household energy and air pollution projects in Ecuador. I led fieldwork, managed equipment, and collaborated with data analysis and quality control. I created custom equipment to fit project requirements, including an electric stove use monitor with real-time visualization of energy cost for subsidy interventions. I learned first-hand how air quality monitoring equipment works, how to calibrate and maintain the devices, and how their technical limitations and complexities affect exposure assessment in the real world. I have worked in collaboration with other universities, governmental agencies, and equipment manufacturers. My interest in air quality and energy technology brought me to Colorado State University where I am now a PhD student, working on the development and evaluation of air quality monitoring devices. I have been trained to conduct aerosol chamber and gas chamber experiments for sensor evaluation. I also have experience using Federal Reference Method (FRM) and Federal Equivalent Method equipment for aerosol sampling. Initially, my research focused on evaluating the particle sizing performance of low-cost sensors. On the development side, I work in electronics design and firmware programming. I have implemented Internet of Things functionality, machine learning, and wireless communication for various devices. My current projects include the development of wearable and stationary monitors for air pollution and noise exposure assessment.

Amirhosein Mousavi

Research associate, University of Southern California

Research Scientist focusing on Environmental Health and Urban Pollution. Application of IoT and sensor networks for smart city, Urban policy investigations. 

Amy Mueller

Associate Professor, Northeastern University

Dr. Amy Mueller is an Associate Professor of Civil & Environmental Engineering and Marine and Environmental Sciences at Northeastern University.  Dr. Mueller’s research lab works at the intersection of urban biogeochemistry and infrastructure, designing novel sensors and sensor networks that leverage physics-informed data-driven approaches to deliver higher resolution, useable data in an urban context.  Dr. Mueller holds S.B., M. Eng. and Ph.D. degrees from the Massachusetts Institute of Technology in Computer Science, Electrical Engineering, and Civil and Environmental Engineering.

Wilton Mui

AQ-SPEC Program Supervisor, South Coast Air Quality Management District

Dr. Wilton Mui is a Program Supervisor in the Monitoring & Analysis Division of South Coast AQMD. He specializes in aerosol measurement, test standard development, and air sensor evaluation using environmental chambers and mobile air monitoring platforms. Dr. Mui received his Bachelor of Science degree in Environmental Engineering from the University of Florida, and his Master of Science and Doctor of Philosophy degrees in Environmental Science and Engineering from the California Institute of Technology. He has an Engineer-in-Training certification and is a South Coast AQMD Certified Permitting Professional.

Mohammed Mujtaba

Senior Research Fellow, Kintampo Health Research Centre


A'Livija Mullins-Richard

Project Lead for Air Justice Lab, The Sanctuary for Independent Media


Wandji Danube NGONGANG

Research Fellow


Zhi Ning

Hong Kong University of Science and Technology

Prof. Zhi Ning is Professor of Division of the Environment and Sustainability and Associate Dean of Academy of Interdisciplinary Studies in Hong Kong University of Science and Technology. His expertise covers urban air quality and environmental monitoring technologies, with a focus on microsensor and its application for air quality management and air science research especially on emission monitoring. Prof. Ning also led the development of next generation air sensor operational and quality control protocol through numerous local and international projects. His accumulated experience in air monitoring using sensors has been over 10 years. Prof. Ning is now the expert panel member for the Global Atmosphere Watch (GAW) of World Meteorological Organization, as one of the leading authors in WMO global sensor reports. He is also panel member for World Health Organization (WHO) Technical Advisory Group of Global Air Pollution and Health, as the representative of Asian-Pacific Region. Prof. Ning has been very active in both research and community engagement with more than 120 international publications, holding multiple US and China patents in sensing technology with international award.

Abid Omar

Founder, Pakistan Air Quality Initiative

Abid Omar has a social mission: how can I help improve the environment of Pakistan? He sees the air pollution emergency in Pakistan as a silver lining — an opportunity to drive environmental awareness and change that will clean up Pakistan for good. A key indicator of environmental issues is pollution that affects our daily lives, specifically air pollution. He found that there is no data for this, so he founded the Pakistan Air Quality Initiative in 2016 to monitor air quality across major urban areas of Pakistan and to provide awareness for air pollution and health issues, and therefore provide impetus for change. Abid advocates for reducing air pollution by providing open access to air quality data, through workshops and conferences, and hopes to publish his data and findings in a scientific journal.

Zheyuan Pei

Graduate Research Assistant, University of Utah

Zheyuan Pei is currently pursuing his Ph.D. in Chemical Engineering under the supervision of Dr. Kerry Kelly. His research focuses on the laboratory and field evaluation of low-cost formaldehyde gas sensors, data acquisition and data analysis. 

Madelyn Percy

Project Coordinator, Education & Community Opportunities unit, Colorado Department of Public Health & Environment


Theresa Pistochini

UC Davis


Helena Pliszka

Air Quality Data Scientist, TD Environmental Services

Helena Pliszka is an air quality data scientist, focusing on community-driven data analysis to inform hyperlocal and regional air quality stakeholders and decisions. 

Naveen Puttaswamy

Assistant Professor, Sri Ramachandra Institute of Higher Education and Research


Garima Raheja

PhD Candidate, Columbia University

Garima Raheja (she/hers) is a PhD candidate in the Department of Earth and Environmental Science at Columbia University and the Lamont-Doherty Earth Observatory. She  holds a BS in Civil and Environmental Engineering, and a BA in Data Science from the University of California, Berkeley. Her work is focused on using low-cost sensor networks and novel data science techniques to understand air pollution, environmental change and health impacts in urban regions across the United States and the Global South. Additionally, Garima is leading the development of methods and best practices for community- and citizen-based science production, and creating pathways and training about environmental justice for graduate and undergraduate students in universities around the world, informed by her childhood in New Delhi, India and with backgrounds in youth community organizing. Garima serves as a US Department of State Air Quality Fellow, AGU Thriving Earth Exchange Community Science Fellow, and sits on the Bay Area Air Quality Management District Advisory Council. She has worked with NASA, the University of Washington, the University of Hawaii, Code for America and the Bay Area Environmentally Aware Consulting Network.

Abdou Safari Kagabo

Assistant Lecturer and PhD Student, University of Rwanda

Abdou Safari Kagabo is an Assistant Lecturer and a PhD student in Atmospheric and Climate Science at the University of Rwanda's College of Science and Technology (UR-CST). He has a Masters degree in Atmospheric and Climate Science and his research focuses on the interactions between urbanization, meteorology, air pollution, and respiratory diseases. He is working on a comprehensive evaluation of the urbanization impacts on air quality that is necessary to handle the issue of the conflicts between urbanization, the atmospheric environment, and health.

Kayla Schulte

Environmental Research Group

Dr. Kayla Schulte is a Postdoctoral Research Associate in the Environmental Research Group with a background in environmental social theory, participatory research, and social data science. Her research broadly explores how knowledge about local air quality is co-produced in society. 

Kayla's research draws on sociological, human geography, and Science, Technology and Society (STS) theory to explore engagement with emerging mobile app, sensors and other digitally enabled sources of real-time air quality information. 

Kayla is PI for a Defra-funded air quality project in Barking and Dagenham. She also faciliates the Breathe London Community Programme. 

Haris Sefo

Head of Research and Sensor Systems Development, Breeze Technologies UG & HCU University Hamburg

Haris Sefo, Head of Research and Sensor Systems Development at Breeze Technologies is responsible for the development of an emission-based wildfire early warning system. The development at Breeze in cooperation with DHS S&T is also the subject of his dissertation at the HafenCity University in Hamburg. Previously, he has led various other research projects at Breeze with government involvement and has also been involved in European research projects. 

Mahesh Senarathna

Research Assistant, Postgraduate Institute of Science, University of Peradeniya


Edmund Seto

Professor, University of Washington

Dr. Seto is an Exposure Scientist and Professor within the Department of Environmental & Occupational Health Sciences at the University of Washington.

Adil Shah

Postdoctoral Research Scientist, Laboratoire des Sciences du Climat et de l'Environnement

I am a metrologist, with expertise in calibrating and testing methane sensors. I have conducted extensive sensor testing across a vast methane sensors price range, from low-cost semiconductor-based sensors through to high-precision laser-based optical sensors. I am also interested in deriving methane fluxes from facility-scale emission sources. I have previously managed field sampling campaigns to derive methane emissions from landfill sites, oil and gas extraction infrastructure and agricultural facilities, using either downwind car sampling or unmanned aerial vehicle sampling. 

Imran Shahid

Research Associate Professor, Qatar University

Dr. Shahid is working as Research Associate Professor at Environmental science Center, Qatar University, Doha Qatar. His focused on atmospheric chemistry and physics, urban air quality, dust, atmospheric processes. He received his PhD from Vienna University of Technology, Vienna Austria. 

Brett Singer



Gwendylon Smith

Executive Director, Founder, Community Health Aligning Revitalization Resilience & Sustainability


Brian Stacey

Knowledge Leader, Air Quality Measurements, Ricardo

I have 35 years experience in the air quality industry, specialising in measurements and QA/QC of inorganic gases, PM10, PM2.5 and UFP.  I'm active in the European standardisation communities for reference methods and sensor systems. 

Eric Sun

Air And Thermal Comfort Concepts Lead, International WELL Building Institute


Olivia Sweeney

Senior Specialist - Data, Clean Air Fund

Olivia Sweeney is Chemical Engineer by education and has worked extensively within a wide range of roles within the environmental sector. Having previously held roles within sustainable supply chain development, as well as waste and resource management she now works as a Senior Specialist for Clean Air Fund. Within this role, she supports and develops grants focussed on ensuring air quality data is globally ubiquitous, citizens understand the quality of the air that they breathe, and every policymaker has good enough data on which they make informed decisions. Her portfolio of grants focusses on the innovative and effective use of wearable sensors as both a data collection and engagement tool. She was named one of the Top 100 most Influential Women in Engineering by FT in 2019 and one of Rife Magazine’s 30 under 30 in 2022 and one of the University of Edinburgh's Climate 75 as well as Black Cultural Archives 40 X 40 Future Leaders. An advocate for equity and justice in all forms, her free time is spent doing community work in Bristol (United Kingdom) exploring the intersection of climate and racial justice. 

Evonne Tang

Senior Biological Scientist, US Government Accountability Office

Evonne Tang is a Senior Biological Scientist at the U.S. Government Accountability Office (GAO), where she led the Air Quality Sensors Technology Assessment. Prior to joining GAO, Evonne worked at the National Academies of Sciences, Engineering, and Medicine (NASEM) for over 18 years serving in different capacities ranging from directing consensus studies to overseeing a competitive grants program. She has a track record of success in collaborating with world-renowned scientists, engineers, business leaders, and health professionals to provide solutions at the interface of science and policy. Her awards and recognition include the GAO-wide Big-Picture Award for her contribution to a first-of-its kind artificial intelligence accountability framework and the NASEM Distinguished Service Award for her sustained outstanding service. Evonne received her BSc from the University of Ottawa, MSc from McGill University, and PhD from Université Laval.

Martine Van Poppel

Senior Scientist, VITO

Dr. Martine Van Poppel obtained a PhD in Chemistry in 1999 at the Catholic University of Leuven.
She started working at VITO in 1999 as a researcher in the unit Energy Technology (Group Vehicle Technology) where she was involved in projects related to the evaluation of automotive after treatment technologies and alternative fuels. 

Since 2005, she works in the team Air Quality measurements of the unit Health at VITO where she leads projects related to urban air quality, combustion-related aerosols, mobile and personal exposure monitoring and sensor measurements and testing. 

She was involved in different national and international projects in which air quality was assessed in relation to traffic and other combustion sources. She contributed to the methodological aspects of a mobile monitoring tool for BC (airQmap) and was involved in citizen science projects where these mobile measurements were used. She has experience in setting up temporary monitoring networks and defining monitoring strategies, with focus on source identification and personal exposure assessment. She has experience in sensor testing and evaluation, and is convenor of CEN TC264 WG42 on sensor testing. She leads a project sensEURcity where sensor systems were tested in three EU cities (Antwerp, Oslo and Zagreb) and is currently task lead of mobile monitoring in the RI-URBANS project.

As Senior Scientist of the team Air Quality Measurements of the unit Health at VITO, she leads projects related to urban air quality, combustion-related aerosols, mobile and personal exposure monitoring and sensor measurements and testing. 

Trinity Vang

Policy and Community Organizer, Brightline Defense

Trinity Vang supports the administration of the Brightline Air Quality Monitoring Programs and policy research on offshore wind and building decarbonization. Her passion for environmental justice stems from seeing her community fight for equity and needs in her hometown of Fresno, California. She received a BS in International Business from the University of San Francisco. She aspires to learn from community members and to utilize policy to empower environmental justice communities.

Diana Varaden

Imperial College, UK


Leonardo Vazquez-Raygoza

Ph.D. Research Associate, The University of Texas at El Paso

Associate at the UTEP College of Engineering, where he has made significant contributions to air quality research. In this position, he is responsible for leading research projects, supervising and mentoring students, and making impactful strides in studies related to air pollution and public health. 

From May 2021 to July 2022, Leonardo worked as an Air Quality  Research Assistant at UTEP. He was crucial in expanding a vital low-cost sensor project for air quality monitoring. This project focuses on the Ciudad Juarez and El Paso regions. It highlights Leonardo's commitment to developing environmental solutions with a public health perspective. 

Leonardo has also made notable academic contributions through his research publications. These include insightful studies on traffic-related air pollution at a U.S.–Mexico port of entry and the spatial variation of particulate matter in the El Paso Del Norte Region. These studies demonstrate the practical application of environmental engineering principles in addressing real-world challenges.

Jeff Wagner

Chief, Environmental Health Laboratory Branch, California Department of Public Health

Jeff Wagner is an aerosol scientist with 25 years of experience in measuring and predicting exposures to airborne particles and environmental chemicals, and serves as the Chief of the California Department of Public Health (CDPH) Environmental Health Laboratory Branch. The goal of his work is to utilize innovative environmental measurements and modeling to protect the health of all Californians. His current work includes community air pollution investigations and interventions focused on low-cost measurements, local sources, and wildfire smoke; evaluation of risk control measures for infectious aerosols; and measuring toxic emissions from emerging sources. 

Zhong-Min Wang

Research Scientist Supervisor,  Lab Unit Chief, California Department of Public Health 


Ya Wang

Hong Kong University of Science and Technology


John Wenger

Professor of Chemistry, University College Cork

John Wenger is Professor of Chemistry at University College Cork (UCC) in Ireland and founding director of the Centre for Research into Atmospheric Chemistry (CRAC Lab). He has over 25 years experience of laboratory and field based research in atmospheric chemistry and air pollution, mainly focusing on VOCs and SOA formation, composition and sources of atmospheric particles. Current research interests include the development and application of sensors for atmospheric measurements.

Daniel Westervelt

Associate Research Professor, Lamont-Doherty Earth observatory, Columbia University

Dr. Daniel M. Westervelt is an Associate Research Professor at Lamont-Doherty Earth Observatory (LDEO). Dr. Westervelt is also an affiliate faculty member of the Columbia University Data Science Institute, an affiliated scientist with NASA Goddard Institute for Space Studies, and an air pollution advisor to the US State Department. He is also a Columbia University Climate and Life Fellow. His current research spans from air quality and climate modeling to deployment and calibration of low cost sensors for air quality. Prior to his faculty position at Lamont-Doherty Earth Observatory, he worked as an Associate Research Scientist at LDEO, and as a Science, Technology, and Environmental Policy (STEP) postdoctoral research associate at Princeton University. He completed his PhD degree in May 2013 in Civil and Environmental Engineering from Carnegie Mellon University.

Ran Zhao

Assistant Professor, University of Alberta