Jennifer Sass is a Senior Scientist at the Natural Resources Defense Council, an environmental non-profit organization, where she has served since 2001., Since 2008, she has served as part-time faculty at the George Washington University Milken School of Public Health. Much of Dr Sass’ work is focused on understanding and explaining the science behind toxic chemical regulation and on advocating for regulations that are consistent with science, health policy, and environmental law. She frequently provides testimony and scientific briefings for members of Congress and federal advisory committees and is a lecturer at George Washington University’s department of environmental and occupational health. She has published over four dozen articles in peer-reviewed journals. She was a Board Member of the NIEHS National Toxicology Program Board of Scientific Counselors (2016-2020). She holds BSc, MSc, and PhD degrees from the University of Saskatchewan, College of Medicine, Department of Anatomy and Cell Biology, and a Post-Doctoral Certificate (2000) from the University of Maryland, College of Medicine, Program in Human Health and the Environment.