Professor Beletsky is a social epidemiology scholar with a 20-year track record of interdisciplinary mixed methods research disseminated through >120 publications across public health, public policy, and legal fields. His work reflects a career-long focus on social determinants of health among people who use drugs. He has conducted numerous empirical studies in domestic and international settings to examine the role of policing in shaping HIV and other health risk. Having developed the SHIELD intervention model, he served as the principal investigator (MPI, with Steffanie Strathdee) of the first-ever research project funded by NIH/NIDA to evaluate how a law enforcement training intervention can improve public health, particularly reducing HIV and overdose risk. Using both quantitative and qualitative methods, his current work continues to explore police practices’ and drug policies’ health effects and pathways by which racial disparities in the criminal legal system result in health disparities. Drawing on the power of interdisciplinarity, The Action Lab at Northeastern University’s Center for Health Policy and Law that he directs has extensive experience in mounting and testing police training interventions and translating public health evidence into policy and legal action. He continues to innovate the SHIELD model to include the behavioral health workforce in delivery of this structural overdose and HIV prevention intervention in Kentucky.