Meet the EPIC Team

EPIC’s Vision

An evolved justice system that realizes its greatest potential for positively impacting the lives it touches.

EPIC’s Mission:

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

EPIC’s Core Values:

  • Collaboration – Engaging community through service and partnership.
  • Determination – Being passionate and committed regardless of challenges.
  • Innovation – Continually advancing learning and understanding.
  • Adaptation – Being flexible, creative, and willing to take risks.

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

William Cash has extensive experience collaborating with criminal justice professionals and community-based service providers to develop programs, policies and initiatives designed to reduce recidivism. Prior to joining EPIC, William worked with an initiative of the City and County of Denver’s Crime Prevention and Control Commission (CPCC) to implement an evidence-based reentry model that helps individuals successfully transition back into the community after their release from jail. He is a seasoned public speaker and trainer for government agencies and private organizations seeking to enhance their services and staff interactions with offender populations. William is a certified Facilitator Trainer for the National Institute of Corrections integrated cognitive behavior change program, Thinking for a Change (T4C) and currently serves on the Denver CPCC’s Racial Ethnic and Gender Disparity Committee. 



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 Rowley



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.



EBP Implementation Specialist

Aaron Stewart has experience working in corrections and the research field.  He worked as a case manager for the Colorado Department of Corrections and as a data supervisor at the Alcohol and Substance Use Research Institute based out of the University of South Florida.  He has also done work as a therapist with Progressive Therapy Systems in Denver, conducting individual and group treatment with sex offenders on parole and probation.  Aaron has a passion for assisting in the restructuring of existing systems to accommodate the implementation of evidence-based practices.  He earned his bachelor’s degree in Psychology and Sociology from the University of South Florida and master’s degree in Forensic Psychology from the University of Denver.



EBP Implementation Specialist

Cara Wagner is an EBP Implementation Specialist working for EPIC (Evidence-Based Practices Implementation for Capacity) since July 2010.  Cara worked as a probation officer for 14 years supervising both Adult and Juvenile offenders prior to joining EPIC. Cara’s experience on the EPIC project includes training and coaching criminal justice professionals across the state of Colorado in MI and implementation science. She has been studying effective implementation since the start of the project and is a member of the Colorado Implementation Collaborative (CIC). Cara is also a member of the Motivational Interviewing Network of Trainers (MINT) .Cara is a representative on four of the seventeen EPIC implementation teams across the state of Colorado. 



Program Assistant II

Tiffany Maestas began working in the criminal justice field in 2002 at the Fort Lyon Correctional facility as an Administrative Assistant I. Tiffany promoted her way though the administrative system within the Department of Corrections until her transfer to Department of Public Safety in 2014. Tiffany earned a Bachelor degree in Business Management in the summer of 2015 and looks forward to the doors that will open up to her as a result.




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