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Our Staff

Gillian Galen Psy.D. - Clinical Director

Dr. Galen attended Tufts University and received her B.A. in Child Development, Spanish, and Community Health in 2001. She attended the University of Hartford and received a Doctor of Psychology in 2008 with a focus on children and adolescents. Dr. Galen completed her Pre-Doctoral Internship at South Shore Mental Health, working at the Bayview Adolescent Clinic & the McLean Brockton ART.  She finished her training as a Post-Doctoral Fellow at 3East, the Intensive Adolescent DBT Residential Treatment Unit at McLean Hospital, where she was foundationally trained in DBT through Behavioral Tech. She is currently The Program Director of The 3East Intensive and Step Down Programs at McLean Hospital and holds an appointment as an Instructor in Psychology in the Department of Psychiatry at Harvard Medical School. In 2013, she co-authored Mindfulness for Borderline Personality Disorder; Relieve Your Suffering Using The Core Skill of Dialectical Behavioral Therapy.  She has her own private practice with a focus on DBT.  Dr. Galen is also a Registered Yoga Instructor (RYT) and has an interest in the impact of yoga and mindfulness on mental health.


Jim Holsomback - Program Director

Jim attended The University of Rochester and graduated with a B.A. in Psychology focusing on Child and Adolescent Studies.  He continued his academic pursuits at Tufts University's Child Development program, completing his Master's Degree coursework, including a practicum at McLean Hospital in the Assessment and Evaluative Services Program.  Following his training, Jim continued working in The Adolescent Services ART Dual Diagnosis Program at McLean Hospital, where he has worked for 15 years.  During his tenure at McLean, Jim has served as The Director of Adolescent Educational Services for 11 years and the Coordinator of Adolescent and Young Adult Placement Services.  Jim travels to 10-15 programs each year in an effort to evaluate adolescent services across the country and works with families to help them identify services that will assist in their recovery.


Kristen Batejan Ph.D. - Group Leader

Dr. Batejan attended the Johns Hopkins University and received her B.A. in psychology. She attended Suffolk University and received her Ph.D. in Clinical Psychology with a specialization in treating children and adolescents. Dr. Batejan completed her predoctoral internship at the University of New Mexico Health Sciences Center and her postdoctoral fellowship at McLean Hospital’s 3East Adolescent DBT Residential Treatment Program. She received DBT training through Behavioral Tech. She is currently working as a staff psychologist at McLean Hospital’s 3East DBT Continuum and has a private practice in Arlington with a focus on DBT for adolescents and young adults.


Laura Street - Group Leader

Laura Street, LMHC, ATR-BC  has been a Board Certified and Registered Art Therapist for 30 years. She has worked with adolescents and young adults throughout her career, training on the ‘’Psychosomatic” Units at Children’s Hospital and working in a variety of settings including Westwood Lodge Hospital and Bay Cove Substance Abuse programs for teens in Chelsea, MA. During her 16 year tenure at McLean Hospital, she worked with adult women at the Hill Center and was intensively trained in DBT in 2007. Most recently, she works at the Klarman Center for young women with Eating Disorders running both DBT and Art Therapy groups. She has a small private practice and enjoys incorporating creativity and art into skills practice.