Our Officers & EJS Team

Nena P. Messina, PhD

Nena Messina is President and CEO at EJS. She is a criminologist with over 20 years’ experience working in criminal justice and substance use research. Dr. Messina's areas of expertise include the association between crime, psychiatric disorders, and substance use, as well as the specialized treatment needs of justice-involved women. Throughout her career, Dr. Messina has directed multiple randomized clinical trials funded by the National Institute on Drug Abuse, the California Endowment,  the Office of Violence Against Women, and the National Institute of Justice.

Kira Jeter, M.P.H 

Kira Jeter is the Secretary for EJS. She has over 10 years of experience implementing and evaluating addiction health services and mental health treatment programs for homeless and justice-involved individuals. Her research interests include gender responsive/trauma informed treatment and evaluation, and mixed methods research. Ms. Jeter has provided technical assistance on data collection, evidence-based practices, project management, and building collaborative partnerships with community-based organizations. Ms. Jeter is currently a Doctor of Public Health student at UC Berkeley.

William Burdon, PhD is a Research Director at EJS. He is a Social Psychologist with over 20 years of experience with criminal justice populations. Dr. Burdon’s areas of expertise include substance use treatment, corrections policy, and HIV/AIDS research. Dr. Burdon currently oversees the projects at Pelican Bay, Corcoran State Prison, and CIM. 

Melissa Koba, MA is a research assistant at EJS with a masters degree in Psychology.

Michael Tann is a retired Associate Warden from the CDCR and is the Program Coordinator for for Exploring Trauma (Moving Beyond Violence) at Corcoran and Kern Valley State Prison. 

Stacy B. Calhoun, PhD 

Stacy Calhoun is the Vice President at EJS. She is a criminologist and has been involved in criminal justice and behavioral health research for over 16 years. She has directed numerous research and evaluation studies funded by the National Institute on Drug Abuse, the California Endowment, the National Institute of Justice, and various correctional systems.  

Lindsey Price

Lindsey Price is the Chief Financial Officer/Treasurer for EJS. Ms. Price has been an essential member to the success of numerous startups and small businesses. After taking a break from the startup world for 4 years, in which she worked with a multi-client Accounting and CPA Firm, Lindsey decided to return to her roots of a San Diego based startup. She is now the owner of L. Price Consulting, which specializes in accounting for small businesses and non-profits.

Velda Dobson-Davis is a retired Chief Deputy Warden from the CDCR and is the Program Coordinator for both Healing Trauma and Beyond Violence programs at Central California Women’s Facility. 

Rochelle Leonard is a retired Captain from the CDCR and is the Program Coordinator for both Healing Trauma and Beyond Violence at the California Institution for Women. 

Carlos Ramirez is a retired Corrections Case Manager from the CDCR and is the Program Coordinator for Exploring Trauma (Moving Beyond Violence) at the California Institution for Men. 

Henry Moran s a retired Corrections Case Manager from the CDCR and is the Program Coordinator for Exploring Trauma (Moving Beyond Violence) at Avenal State Prison. 

Liliana Gregorio, BSW is a research assistant at EJS with a bachelors degree in Social Welfare.

Aida Santos, BS is a research assistant at EJS with a bachelors degree in Criminal Justice.