Ana Ventuneac is an Assistant Professor and Director of HIV Behavioral Research at the Clinical and Translational Research Center in the Division of Infectious Diseases at the Icahn School of Medicine at Mount Sinai. She has conducted complex mixed methods and longitudinal studies primarily randomized controlled trials and comparative effectiveness research to test behavioral interventions in reducing HIV-transmission risks and in improving HIV-related outcomes among persons from diverse backgrounds and from underserved communities. Dr. Ventuneac serves as Co-Investigator on the Adolescent Trials Network to lead efforts on implementation science research of HIV interventions developed for youth. She is also the Principal Investigator of a NIDA-funded health services research grant to work with a team of experts at Mount Sinai to integrate substance use services to detect and treat patients receiving HIV care at the Institute for Advanced Medicine. This study utilizes a stepped wedge trial design to test whether screening and treatment linkage for substance use has a greater impact in identifying patients in need of substance use treatment compared to treatment as usual (TAU).