Dr. Jaime Hart is an Assistant Professor at the Channing Division of Network Medicine, Brigham and Women’s Hospital and Harvard Medical School and in the Department of Environmental Health at the Harvard T.H. Chan School of Public Health. She is an environmental epidemiologist with a focus on the effects of environmental exposures (e.g. air pollution, traffic exposures, the built environment) on chronic disease risk. She is particularly interested in incorporating geographic information system (GIS) technologies and spatial statistics into large cohorts to improve exposure assessment, control for area level confounding by factors such as socioeconomic status (SES), and to explore the geographic distributions of disease. Most of this work has been based in large cohort studies, such as the Nurses’ Health Studies (NHS, NHSII, and NHS3), the Health Professionals’ Follow-up Study, the US Railroad Workers Study, and the Trucking Industry Particle Study.