Timothy Mastro, MD, FACP, DTM&H, is a thought leader in global health science and medicine following a 40-year career in the arena. Dr. Mastro is Adjunct Professor of Epidemiology in the Gillings School of Global Public Health, University of North Carolina at Chapel Hill; Chair of the Board of Directors of the North Carolina Global Health Alliance; Advisor to Dreamlopments Foundation-Thailand; and Principal at Mastro Global, LLC, a health and science consulting company. Dr. Mastro formerly served as Chief Science Officer at FHI 360 overseeing research and science-based programs conducted in the United States and 60 countries globally. Dr. Mastro joined FHI 360 in 2008 following 20 years in scientific leadership positions at the US Centers for Disease Control and Prevention (CDC), initially as an Epidemic Intelligence Service (EIS) Officer. During 1993-2000, he served in Bangkok as Director of the Thai Ministry of Public Health-US CDC Collaboration (TUC) guiding collaborative HIV, STI, and TB prevention research activities in Thailand and Asia. He began his international public health career on the Thai‐Cambodian border during 1983-1985, where he served as a physician with the American Refugee Committee (now Alight) and medical coordinator of the United Nations Border Relief Operation (UNBRO) designing and directing health services for a large population of war-displaced Cambodians. Dr. Mastro has authored 200 published articles and book chapters and has served on committees for the World Health Organization, UNAIDS, PEPFAR, PMAC, and the US National Institutes of Health. Dr. Mastro trained in internal medicine at Metropolitan Hospital and Mount Sinai School of Medicine, New York City. He studied at the London School of Hygiene and Tropical Medicine and received a DTM&H from the Royal College of Physicians of London. He is certified by the American Board of Internal Medicine, a fellow of the American College of Physicians, and a member of the American Epidemiological Society.