Meet the EPIC Team

EPIC’s Vision

A restorative, transparent and collaborative service system.

EPIC’s Mission:

EPIC collaborates with justice partners, using research-informed approaches, to improve outcomes in Colorado Communities.

EPIC’s Core Values:

  • Adaptive
  • Collaborative
  • Impactful
  • Service-Oriented
  • Transformative

Meet the Team

EPIC is a small group whose purpose is to promote the actualization of human potential. We are taking on the challenge of promoting a more collaborative justice system that can move towards common goals. In service to this task, we undertake our work with persistence, with support for each other,and with a clear focus on the purpose of our work. If your agency is selected to receive EPIC services, you will be working with one to two primary Evidence Based Practices Implementation Specialists. 

Diane Passini HIll

EPIC Manager

Diane Pasini-Hill manages the EPIC team. Prior to joining EPIC, she spent 17 years as a researcher and supervisor with the Colorado Division of Criminal Justice Office of Research and Statistics (ORS). During that time, Diane conducted many criminal justice program evaluations and co-authored several ORS project evaluation papers. She also worked as a therapist for youth, adults and families for seven years earlier in her career. Diane earned her bachelor’s degree in Criminal Justice and master’s degree in Counseling Psychology and Counselor Education.




EBP Implementation Specialist

Ty Crocker has a Masters degree in Criminal Justice and a background in corrections and community supervision.  He has experience as a correctional officer for the Colorado Department of Corrections and as supervisor for the pretrial release services program in Arapahoe County. Ty's primary work focuses on the use of Implementation Science to help create the capacity for agencies to implement evidence-based practices to scale. Ty is also a member of the Motivational Interviewing Network of Trainers (MINT), and he currently coaches and trains criminal justice professionals across the State of Colorado in Motivational Interviewing (MI) in an effort to help them build those skills and use them to fidelity with their clientele. 


EBP Implementation Specialist

Michael Guevara


EBP Implementation Specialist

Marlys Merrill



EBP Implementation Specialist

Shelley Siman has 20 years of experience working in social services (case management, program management) the private sector (database marketing, information technology, photography) and social science research and evaluation. Prior to joining EPIC, Shelley worked with the City and County of Denver as a criminal justice planner/analyst in the Department of Safety. In this position, Shelley served as the Transition from Jail to Community coordinator and liaison to the National Institute of Corrections/Urban Institute technical assistance team to implement an evidence-based model of jail reentry in Denver. She also coordinated work and conducted analysis to address racial disparities in Denver’s criminal and juvenile justice systems. Shelley is a training instructor for Thinking for a Change and is passionate about evidence-based practices and working with justice-system involved people. Shelley has a BA in Fine Arts and Psychology from North Park University in Chicago and an MA in International Human Rights and Global Health Affairs from the University of Denver.


EPIC Program Assistant

Tiffany Maestas

EPIC Administrative Assistant

Jill Trowbridge