Who We Are


  • Walmart Foundation
  • Target
  • Environmental Protection Agency
  • Exxon-Mobil Corporation
  • Centers for Disease Control and Prevention
  • Gordon and Betty Moore Foundation
  • National Institutes of Health (NIH) – National Institute for Environmental Health Sciences (NIEHS)
  • National Academy of Sciences Arthur L. Day Fund
  • National Academy of Sciences Cecil and Ida Green Fund


  • Francie Abramson, Target
  • John Balbus, NIH/National Institute for Environmental Health Sciences
  • Linda Birnbaum, NIH/National Institute for Environmental Health Sciences
  • Patrick BreysseCenters for Disease Control and Prevention
  • Natasha DeJarnett, National Environmental Health Association
  • Ogannaya Dotson-Newman, The JPB Foundation
  • Zach Freeze, Walmart
  • Richard Fuller, Pure Earth
  • David Fukuzawa, The Kresge Foundation
  • Al McGartland, Environmental Protection Agency
  • Gary Minsavage, Exxon-Mobil Corporation
  • Jennifer Orme-Zavaleta, Environmental Protection Agency
  • Geoffrey S. Plumlee, U.S. Geological Survey
  • John SeibertDepartment of Defense
  • Kathy Sessions, Health and Environmental Funders Network
  • Robert SkoglundConvestro
  • Joel Tickner, Green Chemistry and Commerce Council (GC3)
  • Jalonne White-Newsome, The Kresge Foundation
  • Elizabeth Yeampierre, UPROSE

Academies Collaborators


Jeremy Mathis, Ph.D., Board Director
Division on Earth and Life Studies — Board on Chemical Sciences and Technology

Jeremy Mathis joined the Academies as the director of the Board on Chemical Sciences and Technology in January 2019. Previously, he served as NOAA congressional fellow in Senator Murkowski’s DC office, while also holding adjunct associate professor positions at Georgetown University and the University of Washington. Prior to his position on the Hill, Jeremy held leadership positions in NOAA—including serving as director of NOAA’s Arctic Research Program from 2015 to 2017 and as director of the Ocean Environment Research Division of NOAA’s Pacific Marine Environmental Laboratory from 2014 to 2015. Before joining NOAA, he directed the University of Alaska Fairbanks’ Ocean Acidification Research Center from 2010 to 2014 and served as an assistant professor at the University of Alaska Fairbanks’ School of Ocean Sciences. Earlier in his career, he worked as a chemical engineer for Citgo Petroleum. Jeremy received his B.S. in chemical engineering from McNeese State University and his Ph.D. in marine chemistry from the University of Miami.

Marilee Shelton-Davenport, Ph.D., Director
Division on Earth and Life Studies — Board on Chemical Sciences and Technology

Marilee Shelton-Davenport, Ph.D., is a Senior Program Officer at the National Academies of Sciences, Engineering and Medicine where she guides the country’s best scientists and practitioners in providing authoritative advice to agencies and other organizations interested in biomedical research and regulatory issues. She has more than 15 years of experience developing and executing impactful activities that serve the National Institutes of Health, the Environmental Protection Agency, the Department of Defense, and the Food and Drug Administration. She also has experience guiding U.S. neuroscientists in international activities and organizing biomedical courses in resource-limited countries. A natural at building bridges and working across traditional siloes in biomedical research, Marilee enjoys learning about the challenges faced by decision makers in federal agencies and identifying opportunities to help those agencies improve human health with the latest science. A leader of multi-disciplinary and multi-sector teams, Marilee is skilled at guiding groups in drilling down to the root of issues, generating strategies, developing creative ideas, and executing ideas.

Elise Zaidi, Communications and Media Associate
Division on Earth and Life Studies 

Elise Zaidi is a Communications and Media Associate for the Division on Earth and Life Studies (DELS). Her primary responsibilities include promoting report releases, creating derivative products for Academies projects and publications, and formulating targeted outreach campaigns for committee and study activities. Prior to starting her work with the Academies in July 2019, she held positions with the Council on Foreign Relations and the Pan American Health Organization. Elise graduated from The George Washington University with a Bachelor of Arts in International Affairs, a concentration in Global Public Health, and a minor in Journalism and Mass Communication.

Kesiah Clement, Program Assistant
Division on Earth and Life Studies — Board on Chemical Sciences and Technology

Kesiah Clement is a program assistant for the Board on Chemical Sciences and Technology. She joined the BCST staff in July, 2019. In May 2019, Kesiah graduated from Georgetown University’s School of Foreign Service with a B.S. in Science, Technology, and International Affairs focusing on global environmental health.

Madison Pravecek, Research Assistant
Division on Earth and Life Studies — Board on Chemical Sciences and Technology

Madison Pravecek is a Research Assistant for the Board on Chemical Sciences and Technology. She has been with The National Academies since June, 2019. Madison graduated from the School of Foreign Service at Georgetown University in May, 2019 with a degree in Science, Technology, and International Affairs, focusing on energy and the environment. Outside of the Academies, Madison volunteers for the Smithsonian National Zoo.

David Butler, Ph.D.
Health and Medicine Division — Board on Population Health and Public Health Practice

Dr. David Butler is Scholar in the Health and Medicine Division and Director of the Office of Military and Veterans Health. Before joining the National Academies, Dr. Butler served as an analyst for the U.S. Congress Office of Technology Assessment, was a research associate in the Department of Environmental Health of the Harvard School of Public Health, and performed research at Harvard’s Kennedy School of Government. He has directed several National Academies studies on environmental health and risk assessment topics, including ones that produced Climate Change, the Indoor Environment, and Health, Damp Indoor Spaces and Health; Clearing the Air: Asthma and Indoor Air Exposures; and Health Risks of Indoor Exposure to Particulate Matter: Workshop Summary. Dr. Butler has also been lead staff officer for a number of reports on the effects of environmental exposures on the health of active duty military personnel and veterans, including volumes of the Veterans and Agent Orange report series. He is a recipient of the Cecil Award, the highest distinction for a staff member of the Institute of Medicine. Dr. Butler received his B.S. and M.S. in engineering from the University of Rochester and his Ph.D. in public policy analysis from Carnegie Mellon University.

Franklin Carrero-Martínez, Ph.D.
Policy and Global Affairs — Science and Technology for Sustainability

Dr. Franklin Carrero-Martínez is the Director of the Science and Technology for Sustainability (STS) Program in the Policy and Global Affairs Division (PGA). Prior to joining the STS program, Dr. Carrero-Martínez was the Acting Deputy Science and Technology Adviser to the Secretary of State. Before that, Dr. Carrero-Martínez held appointments as Associate Professor at the UPR Mayagüez, Adjunct Professor at the UPR Medical Science Campus, and as Visiting Scholar at Duke, MIT and Japan’s Institute of Genetics.

Dr. Carrero-Martínez started his career in science diplomacy and policy as the American Association for the Advancement of Science (AAAS) Roger Revelle Fellow in Global Stewardship. He served this prestigious fellowship with a joint appointment between the Office of the Science and Technology Adviser to the Secretary of State (STAS) and the National Academy of Sciences. At the end of his fellowship, he served as Program Director at the National Science Foundation supporting the agency’s diplomatic and representational obligations, while managing a portfolio of international basic science collaboration grants before returning to STAS in 2016.

As the Department’s senior advisor on science, technology and innovation issues (STI), he directed the STAS Office. In this role he provided senior officials with analysis, guidance, recommendations and strategic planning to anticipate the foreign policy impacts of emerging STI issues, built STI capacity within the Department, and engaged the National Security Innovation Base to promote Department priorities.

Dr. Carrero-Martínez holds a B.S. in Biology, with honors from the University of Puerto Rico (UPR), a Ph.D. in Cell and Developmental Neurobiology, and a Certificate in Business Administration from the University of Illinois at Urbana-Champaign.

Christine Gerencher, MA
Transportation Research Board — Aviation & Environment

Christy joined the Transportation Research Board (TRB) staff in 2005 as a Senior Program Officer for Aviation and Environment in their Technical Activities Division.  She manages the nine committees within the Aviation Group and the eight committees within the Environment and Energy Section within the organization as well as provides support for TRB’s sponsors.  Prior to joining TRB, Christy worked in the corporate environmental department of American Airlines, where she was responsible for both domestic and international noise and air quality issues for the company.  Previous to her time at American, she worked for the Aircraft Owners and Pilots Association as a manager of airport policy and also was a consultant in the environmental practice of Landrum Brown, Inc., an airport planning firm.   Christy graduated with a BS in aviation management and flight and an MPA with an aviation concentration from Southern Illinois University and has been an active pilot for more years than she currently cares to admit.

K. John Holmes, Ph.D.
Division on Engineering and Physical Sciences — Board on Energy and Environmental Systems

Dr. K. John Holmes is the acting director and scholar for the National Academies’ Board on Energy and Environmental Systems (BEES). His responsibilities at BEES include developing, managing, and directing studies and related activities. He is currently the co-director of a study on the development of a RD&D agenda for carbon dioxide removal approaches. He recently served as the director on an electricity system resiliency study and helped organize a joint forum between the Royal Society and National Academies that focused on carbon dioxide removal and reuse. Other studies directed or co-directed by Dr. Holmes include: An Assessment of ARPA-E (2017); Cost, Effectiveness, and Deployment of Fuel Economy Technologies for Light-Duty Vehicles (2015); Overcoming Barriers to Electric Vehicle Deployment  (2015); Electricity from Renewables  (2009); and State and Federal Standards for Mobile Source Emissions (2006).  He also was a member of the NRC’s America’s Energy Future study team.  Dr. Holmes has published on a range of topics including vehicle technologies, mobile source emissions, renewable electricity, climate change, air quality management, stratospheric ozone depletion, carbon emissions trading, regulatory computational models, and the history of climate change assessment and natural resources management. He received a B.S. from Indiana University, M.S.E. from University of Washington, and Ph.D. from The Johns Hopkins University.

Nicole JoyMA
Health and Medicine Division — Communications

Nicole Joy is the Director of the Health and Medicine Divisions (HMD) Office of Communications. She began working for the Academies in 2008 in the editorial office of the Proceedings of the National Academy of Sciences. In 2010, she moved over to the National Academies’ Office of News and Public Information, where she aided in creating and sending out media materials and managing web content. In her current role in HMD, Nicole is the senior staff person responsible for advising on communication strategies and serves as a source for communications expertise for project staff, committees, roundtables, and boards. She is responsible for planning and directing communications activities, initiatives, and communications products for HMD, and manages the HMD communications team. Nicole also oversees the HMD website, email marketing, and social media activities as well as the report production process, and is responsible for the creation of communication and derivative products, such as briefs, infographics, and videos.  Prior to joining the National Academies, Nicole received a Bachelor’s degree in English from Rice University in Houston, TX, and a Master’s degree in English from McGill University in Montreal, Quebec.

Ellen Mantus, Ph.D.
Division on Earth and Life Studies — Board on Environmental Studies and Toxicology

Dr. Ellen Mantus is a Scholar and Director of Risk Assessment on the Board on Environmental Studies and Toxicology with over 20 years of experience in the fields of toxicology and risk assessment. She has served as the study director on numerous projects, including ones that have assessed the health implications of various chemical exposures, developed strategies for applying modern scientific approaches in toxicology and risk assessment, provided guidance to federal agencies on risk-based decision-making, and evaluated barriers to deployment of electric vehicles and associated charging infrastructure. Before joining the National Academies, Dr. Mantus was a project manager with ICF Consulting where she served as a primary reviewer for numerous toxicological studies and provided risk assessment and regulatory support on a wide array of projects.  Dr. Mantus received a PhD in chemistry from Cornell University in Ithaca, NY.

Chris Rea, Ph.D., M.P.H.
Gulf Research Program

Chris Rea is an Associate Program Officer for the Gulf Research Program where he focuses on human and environmental health-related topics as part of the Thriving Communities initiative. Prior to joining the National Academies in 2017, he was a fellow with the U.S. Environmental Protection Agency, serving through both the Association of Schools and Programs of Public Health and the Oak Ridge Institute for Science and Education post-graduate programs. During his fellowships, Chris also worked with the U.S. Global Change Research Program’s climate change and human health workgroup. His research work has broadly focused on water quality, infectious agents, and wetland ecosystem goods and services. Additionally, Chris has been involved in various global health projects and is an active member of the American Public Health Association. He holds a Ph.D. in public health (environmental health sciences) and a Master of Public Health from the Ohio State University, as well as a B.A. in sociology from Vanderbilt University.

Keegan Sawyer, Ph.D.
Division on Earth and Life Studies — Board on Life Sciences

Dr. Keegan Sawyer is a Senior Program Officer of the Board on Life Sciences at the US National Academies of Sciences, Engineering, and Medicine. Her work addresses a wide range of research, policy, and communication questions across the broad spectrum of life science disciplines. She has special interest in the interplay of environmental conditions and human health, ecosystem health, and public engagement in science. Dr. Sawyer is Director of the National Academies’ Standing Committee on Emerging Science for Environmental Health Decisions. She also served as the Project Director for the Roundtable on Public Interfaces of the Life Sciences and the Committee on Gene Drives Research in Non-Human Organisms: Recommendations for Responsible Conduct. She is committed to fostering discussions about research infrastructure, collaborative environments, and public engagement in science to support a healthier people and planet. Dr. Sawyer holds a B.S. in environmental biology from University of California Davis and an M.S. and Ph.D. in environmental sciences and engineering from the University of North Carolina Gillings School of Public Health.

Kathleen Stratton, Ph.D.
Health and Medicine Division — Board on Population Health and Public Health Practice

Kathleen Stratton began her career at the National Academies of Sciences, Engineering, and Medicine in 1990 in the Institute of Medicine. She has spent most of her time with the Board on Population Health and Public Health Practice. She has staffed committees addressing vaccine safety and development, pandemic preparedness, environmental and occupational health, drug safety, and tobacco control. She was given the IOM Cecil Research Award for sustained contributions to vaccine safety and was made a staff Scholar in 2005. After two years at The Pew Charitable Trusts working on FDA reform, she returned to IOM in fall 2013 to direct the Roundtable on Environmental Health Sciences, Research, and Medicine and the Committee on the Health Implications of Raising the Minimum Purchase Age for Tobacco. She most recently directed studies on accounting for socioeconomic status in Medicare payment programs and on the health effects of electronic cigarettes. She received a BA in Natural Sciences from The Johns Hopkins University and a PHD in Pharmacology and Toxicology at the University of Maryland at Baltimore. She conducted post-doctoral research in the Department of Neuroscience at the Johns Hopkins School of Medicine.

Toby Warden, Ph.D.
Division of Behavioral and Social Sciences and Education — Board on Human-Systems Integration

Dr. Toby Warden is the director for the Board on Human-Systems Integration (BOHSI) and the Board on Environmental Change and Society. Dr. Warden returned to the Academies after a 2-year period as Director of Scientific Administration for the Department of Neurological Sciences and Assistant Professor at the University of Nebraska Medical Center, spearheading strategic planning efforts to foster research collaboration. At the Academies previously, she began in 2009 as a study director on climate change and weather related activities with the Board on Atmospheric Sciences and Climate. She joined BOHSI in 2011 as a study director, and later associate board director, working on a number of activities related to worker safety, safety culture, systems design and organizational performance. She holds a Ph.D. in Social Ecology with an emphasis on Environmental Analysis and Design from the University of California, Irvine. A member of the Human Factors and Ergonomics Society she also holds a certificate in Business Fundamentals from HBX/Harvard Business School.

Scott Wollek, MA
Health and Medicine Division — Board on Health Sciences Policy 

Scott Wollek is a Senior Program Officer with the Board of Health Sciences Policy, where he is Director of the Standing Committee for the CDC Strategic National Stockpile and the Standing Committee on Health Threats and Workforce Resilience.  His primary interests focus on relationship networks, capacity building and network governance as applied to emergency management and public health emergency preparedness.

Prior to joining The Academies, Scott served as the Senior Disaster Program Manager at The American Red Cross in the National Capital Region.  In that role he was responsible for the management of preparedness, response and recovery programs throughout the National Capital Region, including the response to over 500 local disasters each year.  In his eleven years with the Red Cross, Scott held a variety of paid and volunteer staff positions involving local disaster response, training, exercises, plans and operations.  Scott served in leadership positions during disasters and special events including the 2009 and 2013 Presidential Inaugurations, 2010 blizzard and the NCR response to Hurricane Irene, Tropical Storm Lee, the 2012 derecho, Hurricane Sandy, and the shootings at the Washington Navy Yard.

Scott holds a Bachelor’s Degree in Emergency Health Services from The George Washington University and a Master’s Degree in Public Administration, with a concentration in Homeland Security and Emergency Management, from George Mason University.  He maintains active membership in The American Society for Public Administration, The International Association of Emergency Managers, and the Virginia Emergency Management Association.