Susan C. Wason is an Adjunct Instructor in Environmental Studies and will be teaching ENVS 1710, Environmental Health and Policy in Fall, 2009. Susan is a ScD candidate in the Department of Environmental Health at Harvard School of Public Health in the Exposure, Epidemiology and Risk program, graduating in November, 2009, and will be a post-doctoral fellow in Environmental Health at HSPH. Her doctoral studies have been focused in the major areas of toxicology and risk and decision sciences. Susan has a BA in Public Health (Natural Sciences) from Johns Hopkins University, and an MPH in Environmental Health Sciences from Yale University School of Medicine, where she completed a master thesis evaluating uncertainties in the exposure assessment of diesel particulate matter and their implications for risk assessment. She also spent several years during and after her master degree providing consultative services in environmental health and risk assessment, and was a Lecturer at Yale for the course Introduction to Toxicology. Susan’s thesis research involves exposure and dose modeling of organophosphate and pyrethroid pesticides for children living in urban, low-income housing, with a focus on factors (e.g. genetic, behavioral) that characterize risk variability. Her research interests include developing toxicological and risk assessment methods, the exposure-dose relationship, risk variability, reverse dosimetry modeling, and modeling methods for cumulative risk assessment.