I am a practicing general internist and a researcher in tobacco control with a focus on populations experiencing homelessness. I am formally trained in a variety of methodologies, including implementation sciences, descriptive epidemiology using national longitudinal and cross-sectional data, policy analysis, randomized controlled trials, qualitative and mixed methods research. Through my work, I have intervened at the individual, community, and policy levels to reduce tobacco-related health disparities. My intervention research stems from collaborations with community organizations. As principal investigator of two prior grants from the Tobacco Related Disease Research Program (TRDRP) , I collaborated with homeless shelters and supportive housing to implement interventions to increase access to smoking cessation services and smoke-free policies among homeless adults. As co-investigator (PI Satterfield, DA034253-04) on an implementation and dissemination grant on a randomized controlled trial of computer-facilitated delivery of 5As for smoking cessation, I worked with 3 diverse primary care clinics to improve provider-delivery of 5As. As co-investigator on a community practice-based research implementation grant from the TRDRP (PI Guydish, 25CP-002) and the San Francisco Cancer Initiative (PI Vijayaraghavan, an intramural grant), I am collaborating with homeless shelters and 14 safety net health clinics in San Francisco to improve delivery of cessation services to high-risk populations in San Francisco. My current work includes a grant from TRDRP on conducting a randomized controlled trial of a contingency management smoking cessation intervention for people experiencing homelessness. I was recently awarded an R37, National Cancer Institute MERIT Award, to conduct a cluster randomized controlled trial of a smoke-free home intervention in permanent supportive housing.