These include: (1) a study examining continuity of care, Medicaid reentry policies, and an intervention to improve engagement in medications for opioid use disorder (MOUD) following release from incarceration; and (2) a study evaluating implementation of a multi-pronged intervention to improve HIV testing, prevention (PrEP), and linkage to care for individuals with opioid use disorder in jail and post-release settings. The Research Manager will engage in substantive research activities across the project lifecycle, including research design, participant recruitment and retention, qualitative and quantitative data collection and analysis, interpretation of findings, stakeholder engagement, and dissemination of research findings.