Meet the Team
Our expertly trained team includes psychiatrists, psychologists, therapists, social workers, nurses, and occupational and art therapists, all of whom specialize in the treatment of traumatized individuals. Each patient receives a comprehensive evaluation based on a clinical assessment, consultation with referring providers, psychometric assessment, and other relevant data.
The patient’s treatment team meets three times weekly to update assessment and treatment planning. All members are actively involved in the team meeting, as we strongly believe that collaboration best facilitates a comprehensive understanding of the patient’s treatment progress and ongoing assessment of the treatment plan.
Richard J. Loewenstein, M.D.
Founder and Medical DirectorClick to Read More
Richard J. Loewenstein, M.D., Founder and Medical Director
Dr. Richard J. Loewenstein is a senior psychiatrist and the founder and medical director of The Trauma Disorders Program at Sheppard Pratt. Dr. Loewenstein lectures frequently on dissociation and trauma to regional, national, and international groups. He is the author of many papers and book chapters on sleep disorders, consultation-liaison psychiatry, dissociation, dissociative disorders, and trauma disorders. He has also received numerous awards for his contributions to clinical studies of trauma and dissociation. Dr. Loewenstein is a clinical professor in the Department of Psychiatry at the University of Maryland School of Medicine, Baltimore, MD.
Susan Wait, M.D.
Service Chief, Inpatient UnitClick to Read More
Susan Wait, M.D., Service Chief, Inpatient Unit
Dr. Susan Wait is one of the founding clinicians of The Trauma Disorders Program’s inpatient unit at Sheppard Pratt, and has been the service chief since 1993. She has extensive experience and expertise in both psychotherapeutic and psychopharmacologic treatment of patients with dissociative disorders, PTSD, complex PTSD, and anxiety disorders. She is also trained in dialectical behavior therapy (DBT) and is interested in broadening the use of this modality in patients with trauma-related disorders. Dr. Wait provides leadership for the integration of DBT into individual, group, and milieu treatment on the inpatient unit.
Joyanna Silberg, M.D.
Senior Consultant, Child & Adolescent TraumaClick to Read More
Joyanna Silberg, M.D., Senior Consultant, Child & Adolescent Trauma
Dr. Joyanna Silberg is the senior consultant for child and adolescent trauma at Sheppard Pratt Health System. Dr. Silberg is internationally known as a pioneering expert in the study of dissociative disorders and complex trauma in children and adolescents. She has edited and authored many works on these topics, including, “The Dissociative Child, and The Child Survivor: Healing Developmental Trauma and Dissociation.” Her private psychotherapy practice specializes in children and adolescents suffering from posttraumatic and dissociative symptoms and disorders. Her private forensic practice specializes in child sexual abuse. She is executive vice president of the Leadership Council on Child Abuse and Interpersonal Violence.
Ken Walters, Pharm.D.
Director, Department of Pharmacy ServicesClick to Read More
Ken Walters, Pharm.D., Director, Department of Pharmacy Services
Dr. Ken Walters, Pharm.D., is director of the Department of Pharmacy Services at Sheppard Pratt Health System. In this role he guides the department in the delivery of pharmaceutical care services at Sheppard Pratt’s Towson and Ellicott City campuses. Dr. Walters maintains an active clinical practice in The Trauma Disorders Program as the program’s psychopharmacologist, and also runs a medication education group on the unit. He has served as a reviewer for The Annals of Pharmacotherapy for more than 10 years and has also published numerous scientific articles in professional publications. Dr. Walters brings a breadth of knowledge and experience in psychopharmacotherapy and is an integral member of the program’s treatment team. His broad experience and knowledge is essential for assistance with the often complex medical and psychopharmacological problems of trauma disorder patients. Dr. Walters is also a clinical assistant professor for the University of Maryland School of Pharmacy, and precepts doctoral students in the University of Maryland’s Doctor of Pharmacy Program.
Victor Welzant, M.D.
Coordinator, Psychology & Director, Postdoctoral Fellowship ProgramClick to Read More
Victor Welzant, M.D., Coordinator, Psychology & Director, Postdoctoral Fellowship Program
Dr. Victor Welzant is the coordinator of psychology and director of the psychology postdoctoral fellowship program for The Trauma Disorders Program at Sheppard Pratt.
Heather Billings, RN
Manager, Inpatient UnitClick to Read More
Heather Billings, RN, Manager, Inpatient Unit
Heather Billings, RN, is the manager of The Trauma Disorders Program’s inpatient unit. She directly supervises the nursing, social work, art therapy, and occupational therapy staff. Heather has been with The Trauma Disorders Program since 2001, providing psychiatric nursing care and milieu treatment. In her current role, she is responsible for the day-to-day operation of the unit, including safety, staffing, and management of the therapeutic milieu. Heather coordinates staffing and clinical issues in the therapeutic milieu. She is extensively involved in staff training and support to help maintain the safety of the unit and to assure that staff are skilled in management of patients’ trauma symptoms. Heather has also been trained in dialectical behavioral therapy (DBT).
Benjamin Israel, M.D.
Attending Psychiatrist and PsychotherapistClick to Read More
Benjamin Israel, M.D., Attending Psychiatrist and Psychotherapist
Dr. Benjamin Israel is an attending psychiatrist and psychotherapist for The Trauma Disorders Program. He graduated from the University of Pittsburgh School of Medicine and trained as a resident physician at University of Maryland / Sheppard Pratt Residency Program. Dr. Israel first worked with The Trauma Disorders Program as a psychiatry resident, when he advocated for the creation of a clinical rotation in trauma disorders and later became the first trainee to participate in that elective. Dr. Israel continued to collaborate with several staff members from this program as he developed an outpatient psychotherapy and medication management practice focusing largely on patients who suffered from early life trauma. During residency, he also acted as service chief of the Consultation-Liaison Psychiatry division, completed additional training in ER psychiatry, and contributed to medical student and resident education.
Lisa Kebejian, M.D.
Attending Psychiatrist and PsychotherapistClick to Read More
Lisa Kebejian, M.D., Attending Psychiatrist and Psychotherapist
Dr. Lisa Kebejian is an attending psychiatrist, psychotherapist, and pediatrician with a unique background and interest in early child development, psychodynamic psychotherapy, and psychoanalytic theory. She is a candidate psychoanalyst at the Washington Psychoanalytic Institute and has completed the adult psychoanalytic fellowship at the Baltimore Washington Center for Psychotherapy and Psychoanalysis. Dr. Kebejian has participated in a number of psychoanalytic and trauma-focused seminars, discussion groups, and conferences nationwide. She has published in the Journal of Trauma and Dissociation and has presented research on the psychopharmacologic treatment of posttraumatic sleep disturbances at the annual meetings of the Academy of Psychosomatic Medicine. She is past recipient of the New York Academy of Medicine David E. Rogers Fellowship, through which she designed and implemented a clinical project to aid trauma-exposed children in Armenia. Dr. Kebejian is a graduate of the University of Maryland/ Sheppard Pratt Psychiatry Residency Program. She earned her medical degree from the University of Maryland and her undergraduate degree in Neuroscience and Behavior from Columbia University.
Beth Ashton, LCSW-C
Social WorkerClick to Read More
Beth Ashton, LCSW-C, Social Worker
Beth Ashton, LCSW-C, earned her master’s degree in social work with a clinical concentration and specialty in mental health from the University of Maryland, Baltimore in 2011. While employed by The Trauma Disorders Program at Sheppard Pratt, Beth earned her LCSW-C by examination in 2014. Since then, Beth has completed coursework towards her clinical supervision certification, as well as continuing education in the clinical areas of complex trauma, personality disorders, suicidality, and other practical domains such as financial stability for clients. Beth has worked with diverse populations in various social work roles, completing her foundation internship in medical social work at Mercy Medical Center and her advanced internship on the children’s inpatient unit at Sheppard Pratt. Since 2011, Beth has also worked in Treatment Foster Care and provided outpatient psychotherapy at a community mental health agency.
Tammy Cyzyk, LCSW-C
Social WorkerClick to Read More
Tammy Cyzyk, LCSW-C, Social Worker
Tammy Cyzyk, LCSW-C, earned her master’s degree in social work at the University of Maryland School of Social Work. She has worked at The Trauma Disorders Program since 2008. Before coming to Sheppard Pratt Health System, she worked at a domestic violence/sexual assault center in Baltimore City, providing psychotherapy to both female and male survivors. In addition, at a local detention center, Tammy co-facilitated a group for women inmates who had experienced domestic violence. Tammy has also worked with children and adolescents, providing individual and family therapy. She graduated from UMBC with a bachelor’s degree in social work and a minor in women’s studies.
Chris Walters Fritze, PMHCNS-BC
Nurse TherapistClick to Read More
Chris Walters Fritze, PMHCNS-BC, Nurse Therapist
Chris Walters Fritze, PMHCNS-BC, is the clinical nurse specialist, and has worked as a psychiatric nurse for more than 25 years. She has been with The Trauma Disorders Program since its inception, as a staff nurse on the inpatient unit, as a patient coordinator, and as the director of The Trauma Disorders Program’s day hospital. Currently, she provides individual therapy and cognitive therapy groups on the inpatient unit, and also conducts outpatient therapy. Chris has also taught psychiatric nursing as an adjunct clinical faculty member at the community colleges of Baltimore County. Chris believes in the resilience of the human spirit, and appreciates seeing patients regain control of their lives through mastering symptom management.
Mara Katz, LCSW-C
TherapistClick to Read More
Mara Katz, LCSW-C, Therapist
Mara Katz, LCSW-C, earned her master’s degree in social work at the University of Maryland School of Social Work, and has worked in various capacities both within The Trauma Disorders Program and in other programs throughout Sheppard Pratt Health System since 2006. She currently works as an individual psychotherapist for both inpatients and outpatients with trauma disorders, co-facilitates a DBT skills group, provides outpatient consultation services, clinically supervises social workers at the LGSW level, and provides administrative support for outpatient programs. Clinical interests include DBT and the application of DBT skills in the treatment of dissociative disorders, family psychotherapy, family psychoeducation, and group psychoeducation and psychotherapy.
Senior Art TherapistClick to Read More
ATR-BC, CGP, Senior Art Therapist
Patricia Prugh, ATR-BC, CGP, senior art therapist for The Trauma Disorders Program, is an internationally known expert on art therapy with patients with dissociative disorders and complex PTSD. Patricia has specialized in trauma recovery art therapy programming at Sheppard Pratt Health System since 1993. She has also worked with the homeless population in Baltimore, many of whom have been severely traumatized. Patricia provides presentations nationally and internationally, and is the recipient of numerous grants and awards for her clinical and artistic work. She believes that the inherent healing aspects of the creative arts process based in psychodynamic principles, and the program’s treatment model, form the core of the art therapy programming for The Trauma Disorders Program.
Elizabeth Wilmer, LGPC
TherapistClick to Read More
Elizabeth Wilmer, LGPC, Therapist
Elizabeth Wilmer, LGPC, received her master’s degree in counseling psychology from Loyola University Maryland and completed her undergraduate work in psychology at the University of Virginia. She began with The Trauma Disorders Program as a mental health worker while in graduate school, and joined the team as a therapist in 2014. Prior to working on The Trauma Disorders Program’s inpatient unit, Elizabeth provided outpatient therapy to individuals at the Women's Growth Center in Baltimore. She provides individual and group therapy to adults on the inpatient unit.
Post-Doctoral Fellowship Program
Natalie Hung, Ph.D.
Postdoctoral Fellow IClick to Read More
Natalie Hung, Ph.D., Postdoctoral Fellow I
Natalie Hung, postdoctoral fellow I, received her Ph.D., from City College of New York, City University of New York in 2016. As a postdoctoral fellow, Natalie conducts individual/group therapy sessions and psychological assessments with patients with complex PTSD and dissociative identity disorder. She also conducts individual outpatient therapy with patients with histories of relational trauma, and completes trauma-informed consultations with patients within Sheppard Pratt Health System. Prior to working for The Trauma Disorders Program, Natalie served as a psychology predoctoral intern for the Veterans Affairs Connecticut Healthcare System, a psychology extern at The Addiction Institute of New York at St. Luke’s Roosevelt Hospital Center, and as a staff psychotherapist and clinical psychology fellow at The Psychological Center at CUNY. Natalie received her undergraduate degree from Yale University.
Katherine MacLean, Psy.D.
Postdoctoral Fellow IClick to Read More
Katherine MacLean, Psy.D., Postdoctoral Fellow I
Katherine MacLean, postdoctoral fellow I, received her Psy.D. from George Washington University, her dissertation focusing on Russian orphans and the psychological impact of early neglect on subsequent development. Interested in a psychoanalytic approach to treatment, Katherine’s expertise includes diagnostic assessment and consultation, complex PTSD, and treatment of personality disorders, anxiety disorders, and depression. She received her undergraduate degree from The University of North Carolina, Chapel Hill.
Admissions CoordinatorClick to Read More
Sharnice Coleman, Admissions Coordinator
Sharnice Coleman, admissions coordinator, manages admissions to the inpatient unit of The Trauma Disorders Program. Sharnice works with outpatient providers and The Trauma Disorders Program’s treatment team to provide a smooth transition for patients. A member of the treatment team since 2004, Sharnice worked previously as a mental health worker, providing direct care to patients, facilitating group psychoeducation, and teaching symptom management techniques one on one.
Outreach and Project ManagerClick to Read More
Chelsea Soobitsky, Outreach and Project Manager
Chelsea Soobitsky, outreach and project manager, has worked at Sheppard Pratt Health System as part of the marketing team since November 2013. She represents The Trauma Disorders Program at professional events including Ivory Garden’s Annual Trauma and Dissociation Conference, the International Society for the Study of Trauma and Dissociation Annual Conference, and the International Society for Traumatic Stress Studies Annual Conference. In addition to her outreach responsibilities, Chelsea also supports The Trauma Disorders Program’s marketing and communication needs. She graduated from the University of Maryland with a bachelor’s degree in communications.