Erin Stack, M.S., has 15 years of experience supporting and leading research and evaluation projects and has expertise in community-based research and participatory, empowerment, and culturally responsive evaluation approaches. Ms. Stack is trained as a community psychologist and her research over the years has focus broadly on studying interventions and programs aimed to promote community health, equity, and safety. Ms. Stack’s recent work has focused on exploring and addressing the needs of people with substance use disorders. She served as the lead data collector and an analyst on a CDC-funded project that aimed to prevent overdoses among women released from prison. Ms. Stack is currently a co-investigator on a NIDA-funded project exploring the impact of peer-delivered contingency management on harm reduction, treatment, and recovery outcomes among people who use stimulants. She also serves as the evaluation lead for two CDC-funded projects: 1) Oregon’s Overdose Data To Action project, which aims to implement a strategic overdose prevention and response plan using surveillance data and community-driven interventions, and 2) the Umatilla County Outreach, Prevention, Engagement (U-COPE) project, which aims to improve access to services for people who use drugs through peer-delivered services and enhanced community collaboration.