Ruzmyn Vilcassim (PhD, MS) is an Assistant Professor at the Department of Environmental Health Sciences. He is also a JPB Environmental Health Fellow at the Harvard T.H. Chan School of Public Health. He earned his Ph.D. and M.S. degrees from New York University in Environmental Health Sciences (Exposure Assessment and Health Effects) and his current research focuses on the health impacts associated with exposure to air pollution and tobacco products, particularly on the harms of using electronic cigarettes. He has previous work experience in environmental pollution prevention, climate change impacts on vulnerable populations, and sustainable agriculture at environmental non-profit organizations, both in Sri Lanka and internationally.