Core Faculty

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  • Joseph Braun

    Director of CEHT, Associate Professor of Epidemiology

    Joseph Braun, Ph.D., is Associate Professor of Epidemiology at the Brown School of Public Health and Director of Brown's Center for Environmental Health and Technology. His research focuses on the determinants and health risks of chemicals found in food, food packaging, water, and consumer products. He is particularly interested in how early life exposure to these chemicals may impact behavioral, cognitive, and cardiometabilic health in children and adolescents. Dr. Braun teaches courses on environmental epidemiology and grant writing. He has provided regulators and policy makers with critical information about the health effects and determinants of exposure to bisphenol A, triclosan, phthalates, and perfluoroalkyl substances.

  • Karl Kelsey

    Professor of Epidemiology, Professor of Pathology and Laboratory Medicine

    Karl Kelsey, MD, MOH, is a Professor of Epidemiology at the Brown University School of Public Health a Professor of Pathology and Laboratory Medicine at the Brown Alpert School of Medicine, and the founding Director of the Center. His research focuses on the application of biomarkers to chronic disease epidemiology.  He is a board-certified occupational physician who was a pioneer in the development of molecular cancer epidemiology and epigenomics. The current research in his laboratory focuses on the use of epigenomic methods to develop immunomethylomics, a new field applying immune biomarkers to epidemiology.  Dr. Kelsey teaches the introductory course in environmental health at the Brown School of Public Health as well as the course in human biology for public health.  He has served on numerous National Academy of Medicine Committees, including recent service on the Committee to Study the Health Effects of Agent Orange and been a member of a number of advisory committees for the National Institutes of Health.

  • Tongzhang Zheng

    Professor of Epidemiology

    Tongzhang Zheng, Ph.D., is Professor of Epidemiology in the Brown School of Public Health where he leads epidemiological research investigating the relationship between environmental exposures and the risk of various cancers in the US and in China, including breast cancer; non-Hodgkin’s lymphoma, Hodgkin’s disease, multiple myeloma, liver cancer, thyroid cancer, lung cancer and testicular cancer. He is currently developing research within the context of three large studies in China – the Jingchuan Metal Exposure Cohort Study, a cohort study of the Kailuan Coal industry, and a pregnancy and birth cohort study in Wuhan – in collaboration with scientists from the China National Cancer Center, China National Institute of Environmental Health Sciences, and several universities in China. Dr. Zheng teaches courses on epidemiologic methods and cancer epidemiology at the Brown School of Public Health. He has served on or led several committees for the National Academy of Sciences and the International Agency for Research on Cancer (IARC).

  • Nan Li

    Investigator in Epidemiology

    Nan Li, Ph.D., is an Investigator in the Department of Epidemiology at the Brown University School of Public Health. Her research focuses on examining the impact of early-life chemical exposure on children’s neurodevelopment, cardiometabolic health, and eating behaviors. Her recent research includes investigating the associations of gestational and childhood phthalate exposure with children’s cognitive abilities and problem behaviors. She also has a background in cancer epidemiology and is interested in studying how life-style risk factors (such as diet) are associated with cancer risk and survival.