Center, Marshall has played a key role in shaping many of the organization's impactful initiatives. As Director of the State Initiatives Division, he led the Justice Reinvestment Initiative, partnering with policymakers in 27 states to develop data-driven policies that reduce corrections spending, lower recidivism, and enhance public safety. His expertise in criminal justice policy, data analysis, and bipartisan collaboration has helped inform policy and practice changes across the country. Throughout his career, Marshall has facilitated high-level policy discussions, worked closely with governors, legislators, and justice system leaders, and testified before legislative committees to drive evidence-based solutions. His commitment to trusted data, practical policy, and meaningful partnerships continues to guide the CSG Justice Center as it works to be the most trusted, useful, and impactful partner for state and local leaders working on advancing safety and justice. Marshall holds a BA in Public Policy with honors from Brown University.

research spans the criminal justice system continuum, from school-based delinquency preventive interventions to reentry and system-wide performance metrics. She has been a principal or co-principal investigator on over $25 million in competitive research grants and contracts and has published over 50 scientific articles, books, and technical reports. Prior to joining the CSG Justice Center, she was a policy researcher at RAND Corporation and an assistant professor at Arizona State University. Jessica received her PhD in criminal justice from John Jay College of Criminal Justice.