Dr. Winters is a Toxicologist with GSI Environmental Inc. in Oakland, California. He has more than eight years of experience in risk assessment, pharmacokinetics, and mechanistic toxicology. Dr. Winters received his B.S in Environmental Toxicology from the University of California, Davis and his Ph.D in Toxicology from the University of North Carolina at Chapel Hill. Prior to joining GSI, he conducted his dissertation research at the U.S EPA Office of Research and Development on developing in vitro approaches to screening volatile chemicals for toxicity using mass-spectrometry. His experience in risk assessment includes exposure assessments and risk characterization for both human health and environmental risk assessments of commercial, industrial, and Superfund sites. Additionally, Dr. Winters has expertise in evaluating data-poor chemicals for persistence, bioaccumulation, and toxicity.