GCH Faculty

Isaac Chomitz is an Academic Program Coordinator in the Department of Global and Community Health. Chomitz is focused on advancing the PhD program and providing graduate students the resources they need to become leaders in public health science. Prior to coming to Mason, he worked in private and state laboratories as a microbiologist and molecular biologist.

Dr. Bloom is a Professor in the Department of Global and Community Health at George Mason University. Bloom’s research focuses on the intersection of environmental pollutants and human health in the U.S. and abroad.

Helen Chin is an Assistant Professor in the Department of Global and Community Health. Her research interests are centered around investigating factors that adversely affect the reproductive health of women and girls, as well as their offspring. Her current focus is studying how endocrine disrupting exposures affect ovarian development and function. 

Dr. Michelle S. Williams is currently an Associate Professor in the Department of Global and Community Health at George Mason University. Dr. Williams’ research is focused on developing culturally appropriate health behavior interventions for cancer prevention and control that will lead to a reduction in cancer disparities. Since 2009, Dr. Williams has been conducting research in Ghana, West Africa that is focused on cervical cancer prevention.

Dr. Carolyn Drews-Botsch is Professor in the Department of Global and Community Health. Her research has focused on the epidemiology of pediatric conditions and the factors, particularly in the perinatal period, that contribute to their etiology.  Specifically, her work seeks to understand these conditions, and carefully apply modern epidemiologic methods to studies of these conditions. Her research program has included work in a variety of related fields including congenital cataracts, fetal growth restriction – particularly in relationship to placental development, intellectual disabilities and autism spectrum disorders.  

Dr. Griffin is a Professor in the Department of Global & Community Health at George Mason University. His research focuses on health risk behaviors such as substance use and abuse (including prescription drugs and opioids), violence and aggression (including bullying and sexual violence) and related behaviors among children, adolescents, and young adults.

Dr. Roess is a professor of Global Health and Epidemiology at the Department of Global and Community Health. She is an epidemiologist with expertise in infectious diseases epidemiology, multi-disciplinary and multi-species field research and evaluating interventions to reduce the transmission and impact of infectious diseases.

Ms. Kelly Beckwith is the Assistant Director of Academic Programs for the Department of Global and Community Health. She is passionate about making sure all students have an excellent experience in the department. Before coming to Mason, Beckwith was a public health practitioner in the field of school health.

Dr. Jenna R. Krall is an associate professor in the Department of Global and Community Health. Krall is a biostatistician with research interests in air pollution and environmental epidemiology.

In 2019, Dr. Robert M. Weiler was appointed Associate Dean for Academic Affairs, College of Public Health at George Mason University. Dr. Weiler holds a Bachelor’s of Arts degree in health and safety education from Marshall University, a Master of Public Health, in community health education from the University of Tennessee, and a Doctor of Philosophy in education with a specialization in school health education from Southern Illinois University at Carbondale.