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Elizabeth E. Epstein, Ph.D. is Professor of Psychiatry, University of Massachusetts Medical School, and Director, UMass National Center on Homelessness Among Veterans. Dr. Epstein is also Professor Emerita, Center of Alcohol Studies, Rutgers University.  She is Principal Investigator and/or co-investigator on several research grants funded by the National Institute on Alcohol Abuse and Alcoholism (NIAAA) and National Institute on Drug Abuse (NIDA).  Dr. Epstein also sees patients privately and also is a Master Trainer and Clinical Training consultant for the Veteran Affairs program to implement evidence based treatments for substance use disorders in the VA system.  Dr. Epstein is author of Addictions: A Comprehensive Guidebook for Clinicians (Oxford University Press) and two treatment manuals and patient workbooks.  


David Smelson, Psy.D. is Professor in the Department of Psychiatry at the University of Massachusetts Medical School and Research Psychologist at the Edith Nourse Rogers Memorial Veterans Hospital in Bedford, Massachusetts.  Dr. Smelson’s work has focused on the treatment of substance abuse and co-occurring mental health and substance abuse in military populations.  His research has been funded for 19 years through the National Institute of Health, the Department of Veterans Affairs, and the Substance Abuse and Mental Health Service Administration.  Dr. Smelson developed an integrated treatment approach called Maintaining Independence and Sobriety through Systems Integration, Outreach, and Networking (MISSION) to address co-occurring mental health and substance abuse problems.  Dr. Smelson has worked closely with the Massachusetts Department of Veterans Services, the Massachusetts National Guard, and the SAVE program to develop and provide a range of services to service members and veterans. 

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Ayorkor Gaba, Psy.D. is a Senior Project Director at the University of Massachusetts Medical School Department of Psychiatry.  Dr. Gaba is a licensed psychologist.  Dr. Gaba has expertise in addictions assessment and treatment, cognitive behavioral therapy, family functional therapy, program management, and clinical supervision. She works on grant-funded research focused on the development of behavioral treatments for women with alcohol use disorders, evaluation of the Maintaining Independence and Sobriety through Systems Integration, Outreach, and Networking (MISSION) treatment approach, and development of interventions aimed at addressing the unique needs of veterans.  Dr. Gaba is an American Psychological Association NGO Representative to the United Nations and also has a private practice. 



Barbara McCrady, Ph.D. is a Distinguished Professor of Psychology and the Director of The Center on Alcoholism, Substance Abuse, and Addictions (CASAA) at the University of New Mexico. She developed and tested our conjoint treatment model for substance abusers and their spouses. Dr. McCrady also has been active in bringing scientific attention to Alcoholics Anonymous, and has conducted research evaluating treatment models for women with alcohol and other substance use disorders, with a special focus on women in poverty. Her work has been funded by the NIH since 1979.


Barry N. Feldman, Ph.D. is Director of Psychiatry Services in Public Safety and Assistant Professor of Psychiatry at the UMass Medical School.  He provides senior leadership to the UMass Memorial Medical Group and the Medical School to address strategic planning and the management of clinical services provided to individuals working in public safety (i.e., police, corrections, fire, EMS), and emergency medicine personnel. He is a clinician and consultant for On-Site Academy, a non-profit residential treatment and training center serving law enforcement and other public safety personnel. Previously, he served as the Primary Clinician for the Boston Police Stress Support Unit, and worked with the Boston Police Critical Incident Stress Debriefing Team.

Douglas Ziedonis, M.D., MPH is Professor and Chair of the Department of Psychiatry at the University of Massachusetts Medical School and UMass Memorial Health Care and President of UMass Memorial Behavioral Health Services. Dr. Ziedonis is an addiction psychiatrist internationally recognized for his research and leadership in addressing co-occurring addiction and mental illness, in particular tobacco and also food addiction. He is Director of the UMass Center of Excellence (COE) in Addictions and Co-Director of the UMass COE in Neurosciences.  His work has been funded by many National Institutes of Health, SAMHSA, and Veteran Affairs (VA) research grants.


Thomas Hildebrandt, Psy.D. is the Director of the Eating and Weight Disorders Program at Mount Sinai and Assistant Professor of Psychiatry at the Icahn School of Medicine at Mount Sinai and oversees the development and execution of both the clinical and research programs.  Dr. Hildebrandt’s research interests and clinical expertise include treatments for alcohol and drug use disorders, men with eating disorders, cognitive-behavioral therapy, Maudsley Family Therapy, treatment of body image disturbances, anabolic steroid use in male and athletic populations, and behavioral weight loss treatment. Dr. Hildebrandt is an expert in biostatistics. 

Cathryn Glanton Holzhauer, Ph.D., is Postdoctoral Fellow with the Psychiatry Department at the University of Massachusetts Medical School.  She is currently working on NIAAA-funded treatment development grants adapting Alcohol Behavior Couples Therapy for a Military population.  Dr. Holzhauer spent time working as a therapist in the Albany VAMC Chemical Dependency Rehabilitation and PTSD Programs.  Her research interests are in the development of cognitive behavioral therapies for alcohol use disorders (AUDs) and studying the change mechanisms of these therapies as they pertain to subgroups of individuals with AUDs.  She is particularly interested in gender differences within these mechanisms and the unique needs of women with AUDs.

Rachel Rosen, B.S. is a Clinical Research Assistant with the  at the University of Massachusetts Medical School Department of Psychiatry.  Rachel received her B.S. in Psychology from the University of Massachusetts Amherst.  Her coursework and internships focused on providing support and services to vulnerable populations.  With diverse research interests, Rachel has been involved in studies on infant cognition and development and Fragile X syndrome, and is currently involved in treatment development research.

Tatiana Gray, M.A. - Study Clinician.  Ms. Gray is an advanced doctoral candidate in Clinical Psychology at Clark University. Ms. Gray has experience working with veterans in both clinical and research contexts, and specializes in couple therapy. She also has expertise in the treatment of substance use, relationship distress, and PTSD.  Her research focuses on communication patterns, effective Couple Therapy, and healthy relationship functioning. 


Jumi Hayaki, Ph.D. - Study Clinician.  Dr. Hayaki received her Ph.D. in Clinical Psychology from Rutgers University and did a post doctoral fellowship in Addiction at Brown University.  She is currently an Associate Professor of Psychology at Holy Cross College, and an expert in cognitive behavioral therapy for individuals and couples.