P-SNAP Speakers Bureau

Pediatrics

Edward C. Ketyer, M.D., F.A.A.P.

Dr. Ned Keyter is a Pittsburg, Pennsylvania-are pediatrician. Dr. Ketyer enjoyed 26 years in private practice before retiring from patient care in 2017. He remains a member of the American Academy of Pediatrics Council on Environmental Health and Climate Change and is President of Physicians for Social Responsibility Pennsylvania. Dr. Ketyer is Medical Advisor for the Environmental Health Project bringing attention to the health impacts of fracking and petrochemicals in the Marcellus Shale gas patch.

Dr. Ketyer’s work connects the rapid expansion of shale gas extraction (fracking) and petrochemical/plastic development in the Ohio River Valley with the local and regional health impacts currently experienced by residents, and the global ecologic and public health catastrophes resulting from fossil fuel pollution and climate change that threaten the health and well-being of all passengers on this shining ball of blue.

Public Health & Policy

Megan J. Wolff, PhD MPH

Megan J. Wolff, Ph.D., MPH is the executive director of P-SNAP. She is a dedicated science communicator, and enjoys conveying ideas in ways that are relatable to medical and lay audiences alike.

From 2022-2023, she served on the Minderoo-Monaco Commission on Plastic and Human Health, which compiled an authoritative report on the health effects of plastic. She was the Health Policy Director at Beyond Plastics from 2021-2024. Dr. Wolff is an adjunct faculty member at Cooper Medical School of Rowan University, and offers an online class on plastics, microplastics, and human health. She is a frequent public speaker.

Dr. Wolff believes that climate change is the greatest threat to health and well-being in contemporary life, and that overproduction of plastics touches on every phase of the climate fight. She received her Masters and her Ph.D. in Public Health from Columbia University, and her BA in English from Wesleyan University. She lives with her family in New Paltz, New York.

Citizen Activist

Jess Conard, M.A., CCC-SLP

Jess Conard, M.A., CCC-SLP is an environmental advocate and licensed speech-language pathologist with a robust background in public speaking, particularly in the realms of plastic pollution and public health. Jess has been a public speaker and educator for many years. Her environmental advocacy journey began in response to the February 2023 train derailment and chemical spill in East Palestine, Ohio, her hometown. This event propelled her into high-profile grassroots activism, where she became a prominent voice for environmental and public health concerns.

In August of 2023, Jess was recruited to serve as the first Appalachia Director at Beyond Plastics, where she leads and supports local and regional campaigns to promote safe solutions to plastic waste. Jess also leads a national campaign to ban vinyl chloride where she works in solidarity with chemically impacted community members across the county.

Beyond her role at Beyond Plastics, Jess collaborates with a wide network of legal experts, medical professionals, scientists and activists from around the globe to support communities affected by plastic pollution and chemical disasters. Jess frequently gives talks to audiences that range from community groups and college students to state and federal legislators, medical professionals and academic scientists.

Jess is determined to educate the world on the power of local voices, the dangers of plastics and how we can safeguard against environmental disasters. She serves on the Community Advisory Board for The University of Kentucky’s health tracking study and as a Community and Tribal Liaison for The National Academies of Science Engineering and Medicine (NASEM). In March 2025, Jess was selected for a fellowship opportunity with Halt the Harm Network to do specific work in social movements. She was a recipient of a research scholarship at Cleveland State University, received her Masters degree in Speech Language Pathology from Kent State University and her BA in Speech Sciences from The Ohio State University. Jess is a displaced resident of East Palestine, Ohio and now lives with her family in Youngstown, Ohio.

Pediatric Emergency Medicine

Hilary Ong, MD FAAP

Dr. Hilary Ong is an Assistant Professor of Pediatric Emergency Medicine at University of California, San Francisco. Her work centers on healthcare sustainability, with a focus on waste reduction, decarbonization, and reducing plastic overuse in clinical settings. She is particularly interested in the health impacts of plastic exposure and advancing evidence-based strategies to minimize environmental harms in healthcare delivery.

Dr. Ong co-leads the Pediatrics Pandemic Network’s Weather Task Force, a federally funded initiative supporting weather related disaster-responsive strategies across children’s hospitals. She also co-leads the Climate Hub, a national educational webinar through the UC Center for Climate, Health, and Equity, and co-created a climate, health, and equity curriculum for the UCSF Emergency Medicine Residency Program.

A recipient of the Emerging Physician Leader Award from Healthcare Without Harm in 2019, Dr. Ong combines research, education, and advocacy to build climate-resilient and environmentally responsible health systems.

Healthcare Sustainability

Hardeep Singh, MD MPH

Hardeep Singh, MD MPH, is a Professor of Medicine at Baylor College of Medicine, Houston. He leads a portfolio of multidisciplinary research focused on quality and safety, with a primary emphasis on measuring and reducing diagnostic errors in healthcare, improving the use of health information technology, and transforming healthcare systems. He is a frequent speaker on this subject and has presented on healthcare sustainability at Cleanmed and several other national and international meetings, including those convened by the National Academy of Medicine, the Organisation for Economic Co-operation and Development, and the WHO.

Dr. Singh’s research has informed several national and international patient safety initiatives and policy reports, including those by the National Academy of Medicine (NAM), the CDC, the OECD, the WHO, and the White House. He has co-chaired and participated on several national and international panels and workgroups focused on measuring or improving patient safety and diagnostic excellence and helped develop pragmatic resources, including the ONC SAFER Guides, Safer Dx Checklist, Measure Dx, and Calibrate Dx, to promote patient safety in clinical practice.

Dr. Singh’s recent contributions include system strategies and policy-level approaches for accelerating climate action and environmental sustainability in healthcare. He is a member of the NAM Climate Collaborative and helped develop NAM’s “Key Actions to Reduce Greenhouse Gas Emissions by U.S. Hospitals and Health Systems.” He co-chaired the Technical Expert Panel that developed “Reducing Healthcare Carbon Emissions: A Primer on Measures and Actions for Healthcare Organizations to Mitigate Climate Change,” released by the Agency for Healthcare Research and Quality. Singh currently serves on the Executive Committee of The Lancet Commission on Sustainable Healthcare and co-leads its Environmental Performance and Quality Measures working group. He and his collaborators from the Federal Health Systems Learning Network were awarded the U.S. Department of Health and Human Services Green Champions Award for their initiatives on measuring and reducing greenhouse gas emissions in federal healthcare systems. Dr. Singh has received several prestigious awards for his pioneering work, including the Presidential Early Career Award for Scientists and Engineers (PECASE) from President Obama in 2014 and the 2021 John M. Eisenberg Patient Safety and Quality Award for Individual Lifetime Achievement.

Psychiatry

Elizabeth Ryznar, M.D., MSC

Dr. Elizabeth Ryznar is an experienced psychiatrist and medical educator. She completed her medical training at Harvard Medical School, her residency training at McGaw Medical Center of Northwestern University, and her postdoctoral training in medical education at Johns Hopkins. She also has a Masters degree in Comparative Social Policy from Oxford University. She currently serves as the Associate Chair of Psychiatry at St. George’s University and as a part-time Assistant Professor in the Department of Psychiatry at Johns Hopkins School of Medicine. She has published multiple peer-reviewed articles and co-edited a textbook called Landmark Papers in Psychiatry with Oxford University Press. She is using her platform as a brain doctor to highlight the neuropsychiatric harms of plastics production and use.

Emergency Medicine

Bridget Lee, MD

Bridget Lee is an emergency physician based out of Boston. Around 2019 she learned that hospitals discard an average of four pounds of waste per patient visit in the ER, a large percentage of which is plastic. It was a realization difficult to square, particularly since plastic itself can be so harmful to human health. Since then, Dr. Lee has become dedicated to educating other health care providers about this disconnect, and what can be done. She is currently running the sustainability team at her institution, where they are reducing plastic use wherever they can.

Obstetrics and Gynecology

Jane van Dis, M.D.

Dr. Jane van Dis is a founding member of P-SNAP. She is an Assistant Professor of Obstetrics & Gynecology at the University of Rochester, where she works full time. She lectures nationally and internationally on the intersection of the climate and plastics crisis and women’s and maternal health. Dr. van Dis Co-Founded OBGYNs For Sustainable Future, an interest group of Healthcare Without Harm. She has published in academic journals on the climate and plastic crisis and women’s health. Before working on climate, Dr. van Dis was co-founder of TIMES UP Healthcare addressing gender equity and sexual harassment in healthcare. She has a TikTok where she addresses plastic and women’s/maternal health.

Pediatrics

Charles (Chase) E. Moon, MD, FAAP

Dr. Charles (Chase) Moon, MD, FAAP is a T32 Pediatric Environmental Health Postdoctoral Fellow in the Icahn School of Medicine at Mount Sinai’s Department of Environmental Medicine. He co-chairs the Committee on Environmental Health and Climate Change as well as the Public Policy and Advocacy Committee for the New York State American Academy of Pediatrics and is an executive board member of New York Clinicians for Climate Action. He is a member of multiple NYS advocacy groups, including the Just Green Partnership, NYRenews, the Lead Free Kids NY coalition, and the Bronx Climate and Environmental Justice Network. His research focuses on community-based participatory research methods, climate graduate medical education, and developing new tools for clinicians and patients to use to address environmental health issues in their homes and communities.

Environmental Health

Sarah Evans, PhD MPH

Sarah Evans is an Assistant Professor in the Department of Environmental Medicine at the Icahn School of Medicine at Mount Sinai. She obtained her doctorate in neuroscience from Weill Cornell Medical College and her Master of Public Health degree from Mount Sinai, where she also completed a three-year fellowship in Environmental Pediatrics. Her research focuses on how early life exposure to endocrine disrupting chemicals like BPA and phthalates shape the brain and behavior. Through her work with the Mount Sinai Center on Health and Environment Across the LifeSpan (HEALS), Children’s Environmental Health Center (CEHC), Region 2 Pediatric Environmental Health Specialty Unit (PEHSU), and the New York State Children’s Environmental Health Centers (NYSCHECK), Dr. Evans is committed to translating research to action to promote safer practices and policies that protect communities from toxic chemicals. To this end, she is also a member of the New York State Public Health Association (NYSPHA) Policy Advocacy Committee and Connecticut Health Professionals for Climate Action (CHPCA). Lastly, Dr. Evans co-directs the NYSCHECK Summer Academy, an 8-week training program that provides foundations in environmental health and advocacy to the next generation of public health professionals.

Sustainability

Diane (Didi) Bild, MD, MPH

Diane (Didi) Bild, MD, MPH co-founded Beyond Plastics Montgomery County Maryland in February 2024. Trained in internal medicine and epidemiology, she retired from a career in clinical research at the Centers for Disease Control, the National Institutes of Health, and the Patient-Centered Outcomes Research Institute. She has a longstanding interest in environmental issues and, based on recent research on the relationship between microplastics and health, she is applying her medical and epidemiological research skills in this arena, as well as advocating for reducing plastic waste.