Dr. Brandon Marshall is an Associate Professor of Epidemiology at the Brown University School of Public Health. Broadly, his research focuses on HIV/AIDS, substance use epidemiology, and the social, environmental, and structural determinants of health of urban populations. He is the inaugural recipient of the National Institute on Drug Abuse "Avenir" award, which supports a research program using agent-based modeling to investigate HIV transmssion dynamics among people who use drugs and involved in a number of other NIH and CIHR-funded cohort studies of people who use drugs, street-involved youth and men who have sex with men. Marshall is also the Associate Public Health & Epidemiology Editor of the International Journal of Drug Policy.