Dr Elvin Geng MD, MPH is Associate Professor of Medicine at the University of California at San Francisco (UCSF). Dr Geng’s research uses the lens of Implementation Science to understand and optimize the uptake of clinically efficacious interventions for HIV into routine care in resource-limited settings. Specific projects address engagement and retention in HIV care, improving antiretroviral therapy initiation, adaptive strategies for retention, and evaluating decentralized and community- based models of care. His work is based in the United States as well as in Uganda, Kenya, Zambia, and Zimbabwe. Dr Geng is the Co-Principal Investigator for the following grants in Zambia funded by the Bill and Melinda Gates Foundation: Better Information for Health in Zambia study, Community ART for Retention and the newly awarded Person-Centered Public Health for HIV Treatment in Zambia.