Steph Irwin  | 

Since joining Roca in 2021, Steph Irwin has led client and training logistics, project management, contracting, billing, reporting, internal coordination, and capacity planning for the Roca Impact Institute. Prior to joining Roca, Steph served in the Baltimore City Mayor’s Office of Neighborhood Safety and Engagement supporting data-driven performance management, operations, technical assistance for CBO partners, and staff support for Safe Streets, the city’s flagship community-based violence intervention program. Steph brings a background in public health and program evaluation from previous work at the Baltimore City Health Department and the Johns Hopkins School of Medicine. She holds bachelor’s and master’s degrees in public health from Johns Hopkins University.

James Timpson  | 

For over 20 years, JT has developed extensive expertise and leadership in violence intervention initiatives. JT previously helped drive the successful expansion of Roca Baltimore as a founding Director and has now joined the Roca Impact Institute as Managing Director of Community Violence Initiatives. He serves as a subject matter expert on building community partnerships, safety and risk mitigation, understanding brain science, trauma, and behavior change interventions. In his role, JT oversees and scales the Roca Impact Institute’s training and coaching initiatives with Community Violence Intervention programs across the country, cultivates strategic partnerships, and fosters national visibility for Rewire CBT as an individual behavior and systems change strategy. 

JT’s passion and expertise extend well beyond his work at Roca. He currently serves as a committee member for the Baltimore Mayor’s Cabinet for Boys and Young Men of Color. JT also serves as an advisor on both the Johns Hopkins Innovation Fund, and the Accountability Board Selection Committee for Johns Hopkins University. He is a two-time panelist on gun violence for the Amnesty International Annual General Meeting, and in 2021 he was awarded Hometown Hero for Gun Violence by Amnesty International. 

Jennifer Clammer  | 

Jennifer Clammer rejoined the Roca team after 20 years to help the Roca Impact Institute bring the belief, the strategies, and the evidence to communities that change is possible. Prior to rejoining Roca, Jennifer was the Chief Strategy Officer at the Phoenix Charter Academy Network, a network of alternative schools committed to re-engaging young adults toward a high school and college path. Prior to that she was the National Director of Technical Assistance at YouthBuild USA, a 250 + network of alternative education and workforce development programs. 

Anisha Chablani-Medley  | 

Anisha Chablani started her career at Roca as a youth worker in 2000 and began running Roca’s programming in 2002. Previously, as Roca’s Chief Programming Officer, Anisha oversaw Roca’s staff training functions and was responsible for creating and implementing Roca’s performance-based management system. In 2021, Anisha joined the Roca Impact Institute as Senior Advisor of Program Design, Training & Equity. In her current role, Anisha leads the planning, development, and implementation of Rewire, Roca’s CBT curriculum which she authored in partnership with Massachusetts General Hospital, across our client portfolio. She also manages the Roca Impact Institute’s facilitator team. 

Anisha has over 15 years of direct service experience, working with high-risk young adults, and over 8 years of program and organizational management experience. She holds a B.A. from Boston College, and a master’s degree in Education from Lesley University. 

Lili Elkins  | 

Lili Elkins has served as Roca’s Chief Development and Strategy Officer since 2011 and, prior to that, served as a consultant to Roca for five years. Lili provides assistance with resource development; strategic planning and financial forecasting; program design, development, operations and replication; program evaluation, including work with third party evaluators; and operation of special projects.

In addition to her work at Roca, Lili is an adjunct professor at Columbia University’s Executive Program for a Master’s Degree in Public Administration, where she teaches Financial Management in Government and Nonprofits and in Columbia University’s Mailman School of Public Health where she teaches Public Health Finance.

Lili has over 20 years of fundraising, program design and program management experience working with non-profits. A member of the New Jersey Bar, she has her J.D. from Rutgers University, an M.A. in public policy and administration from Columbia University, and a B.A. from Barnard College, Columbia University.