Gary Maartens is head of the Division of Clinical Pharmacology, University of Cape Town, and a chief specialist physician at Groote Schuur hospital, where he does clinical service in internal medicine and infectious diseases. His main research interests are in therapeutic aspects of HIV-associated tuberculosis, drug-resistant tuberculosis, and antiretroviral therapy in resource-limited settings. He has published over 200 peer reviewed articles, including invited seminars on both tuberculosis and HIV for the Lancet.
In 2015 he was awarded a gold medal for outstanding contributions to medical research by the Medical Research Council of South Africa. He was the founding president for the South African College of Clinical Pharmacologists. He has been involved in developing national drug policy guidelines for medicine and primary care; and in international guideline development for the management of HIV and tuberculosis for the World Health Organization and the Centers for Disease Control and Prevention. He serves on the Tuberculosis Transformative Science Group of the AIDS Clinical Trials Group, National Institutes of Health.