Karen Emmons is faculty lead of Community Engagement at Harvard Catalyst. She is a professor of social and behavioral science at the Harvard T.H. Chan School of Public Health. Emmons is a behavioral scientist with a strong track record of funded research in community-based approaches to cancer prevention in a variety of settings that serve historically disadvantaged communities, including low income housing and community health centers. Her work targets inequalities related to a range of cancer risk factors, including nutrition, physical activity, sun exposure, tobacco and second-hand smoke exposure, and cancer screening. She has particular expertise in implementation science, particularly in community health settings, and has been actively involved in national efforts to develop implementation research and training programs. She is an elected member of the National Academy of Medicine, and past president of the Society of Behavioral Medicine.