Dr. Katherine von Stackelberg, Principal, specializes in developing risk-based modeling tools to support environmental decision-making. Much of her work has focused on incorporating quantitative uncertainty analysis (e.g., analytical, probabilistic, and fuzzy methods) into the risk assessment process, and she has been at the forefront of the effort to promote uncertainty analysis and methods for communicating uncertainty to support environmental decision-making. She has extensive experience in the context of management of contaminated sediments. An emerging focus area for Dr. von Stackelberg is developing tools and methods to support sustainable approaches to environmental decision-making, particularly with respect to ecosystem services. Dr. von Stackelberg serves on the US EPA Board of Scientific Counselors and is leading an effort to explore the use of decision analytic tools and methods to support environmental decision making within the Office of Research and Development, and is a member of the Scientific Advisors on Risk Assessment for the European Commission in Brussels. She is also a Research Manager at the Harvard Center for Risk Analysis overseeing a grant on uncertainty analysis in decision-making. 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.

Dr. Pamela Williams, Principal, has expertise in exposure assessment, retrospective exposure analysis, human health risk assessment, decision analysis, and risk communication. She is also currently a Fellow with the non-profit organization, Toxicology Excellence for Risk Assessment. She has extensive scientific consulting experience and recently 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. She 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 the Society for Risk Analysis (SRA) in recognition of excellent contributions to the field of Risk Analysis.  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.