Beyrer has led collaborative research on HIV epidemiology, prevention and treatment in Southeast Asia, Sub-Saharan Africa, and Eastern Europe and Central Asia for more than 30 years. He is past president of the International AIDS Society, the world’s largest body of HIV professionals, and currently serves as an advisor to the U.S. President’s Emergency Plan for AIDS Relief (PEPFAR), the HIV Vaccine Trials Network, the World Health Organization, and Physicians for Human Rights. The author of over 400 scientific papers, he was named in 2022 to the annual list of the world’s most cited scientists.