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Dr. Pamela Williams, Principal and Owner of E Risk Sciences, LLP, has expertise in exposure assessment, retrospective exposure analysis, human health risk assessment, decision analysis, and risk communication. She is also currently a Clinical Assistant Professor in the Department of Environmental and Occupational Health at the University of Colorado, and a Fellow with the non-profit organization, Toxicology Excellence for Risk Assessment.  She has extensive scientific consulting experience and has served as a Senior Science and Policy Advisor in the Office of Research and Development at the U.S. Environmental Protection Agency.  Her work has included conducting scientific literature reviews and analyses of various chemicals in the environment, characterizing human exposures and health risks in occupational and community settings, designing and implementing indoor air exchange rate and exposure simulation studies, and designing environmental health education materials.  Most of this work has been published in the peer-reviewed literature and presented at technical and scientific conferences nationally and internationally.

Dr. Williams serves as a peer reviewer for numerous journals, peer review panels, and government agencies.  She is on the editorial board of Human and Ecological Risk Assessment.  She is current Chair of the Risk Assessment Committee of the American Industrial Hygiene Association (AIHA) and past Chair of the Exposure Assessment Specialty Group of the Society for Risk Analysis (SRA).  She also previously served on the Board of Directors of SRA and is currently the President-Elect of the Society.  Dr. Williams is the 2007 recipient of the Joan M. Daisey Outstanding Young Scientist Award, granted by the International Society of Exposure Science (ISES) in recognition of outstanding contribution to the science of human exposure analysis by a young scientist, and is the 2009 recipient of the Chauncey Starr Distinguished Award, granted by SRA in recognition of excellent contributions to the field of Risk Analysis.  She received a Fellow Award from SRA in 2012, granted in recognition of substantial achievement in science or public policy related to risk analysis and substantial service to the Society.  Dr. Williams received her Master of Science (MS) degree in Health and Social Behavior and her Doctor of Science (ScD) degree in Environmental Science and Risk Management, both from the Harvard School of Public Health.


Dr. Katherine von Stackelberg, Principal and Owner of NEK Associates LTD, is a Consulting Scientist at E Risk and a Research Scientist at the Harvard Center for Risk Analysis.  Dr. von Stackelberg received an A.B. cum laude from Harvard College, and a Sc.M. and Sc.D. from the Harvard School of Public Health in Environmental Science and Risk Management.