Justin is an epidemiologist with expertise in HIV and substance use. He is an Assistant Professor of Clinical Implementation Science and Intervention with the Department of Psychiatry at Columbia University. His current projects examine the health benefits of drinking reductions among the U.S. general population, as well as intervention research aimed at HIV treatment and prevention adherence. Dr. Knox earned his PhD in Epidemiology from Columbia University; his dissertation focused on substance use and HIV risk among social networks of Black South African men who have sex with men, work funded by a Ruth L. Kirschstein National Research Service Award from the National Institute on Drug Abuse and the U.S. Fulbright Student Program. Dr. Knox has a Master’s of Public Health from Columbia University, a Master’s of Science in Medical Anthropology from University College London, and a Bachelor’s of Arts from Middlebury College. He also served as a Peace Corps volunteer in Swaziland.