Dr. Ellenhorn is a graduate of Pitzer College. He received his MA in School Psychology and Ph.D. in Combined Clinical/Research Psychology in 1989 at the Derner Institute of Advanced Psychological Studies, Adelphi University. Dr. Ellenhorn is a Board Certified Psychoanalyst (ABPP). He is a graduate and faculty, Massachusetts Institute for Psychoanalysis. Dr. Ellenhorn is President-Elect, of the American Board and Academy of Psychoanalysis, and American Board of Professional Psychology, where he serves as Co-Chair of the Equity, Diversity, and Inclusion Committee; Diversity Representative to the ABPP Board of Trustees; and Mentorship Program Coordinator. He is Chair of, the Psychodynamic Psychology and Psychoanalysis Specialty Council, and Psychodynamic Psychology and Psychoanalysis Representative to the Council on Specialties in Professional Psychology. For Division 39, APA, he is on the Education and Training Committee. He lead the teams responsible for creating the 2022 APA Specialty in Psychoanalytic and Psychodynamic Psychology and Subspecialty in Psychoanalysis, the 2021 Division 39 Psychodynamic and Psychoanalytic Psychology Survey, and Co-Authored the APA Psychodynamic and Psychoanalysis Taxonomy. He serves on the Editorial Board of Professional Psychology: Research and Practice, and is a Research Manuscript Reviewer for Psychoanalytic Psychology (APA journals). Dr. Ellenhorn is the Faculty Coordinator for the Antioch Society for Psychoanalytic Psychology, as well as the Psychoanalytic Society for Your Dreams.

Dr. Ellenhorn’s clinical and research interests include processes and structures of objectification and dehumanization, dreams and other forms of psychical experiencing, verbal expression and physical and emotional health, intergenerational transmission of culture and systems of fetishized delusional beliefs and objects, deracination sequelae, unconscious communication, character formation and maintenance, and psychotherapy process research. He has presented papers nationally on such topics as psychodynamic and psychoanalysis practice survey, psychoanalytic pedagogy, dreams, silence, humor, nonverbal participation, psychotherapy process, discourse analysis, language and personality style, referential functioning, multiple code theory, varieties of self-experience, siblings, dissociation, therapist couples, violence and PTSD, the future of professional psychology, psychoanalytic education, anomie, and professional correspondences in history. He was formally a Principal of the Ellenhorn Consultation Group, providing leadership development, executive coaching, assessment, team building, and human factors consultation. He has worked internationally with issues of globalization, high growth, leadership, and creativity.

Dr. Ellenhorn was previously an Instructor in Psychiatry, at the Albert Einstein College of Medicine. He has also held positions as Adjunct Faculty and Supervisor in, Doctoral Program, at Smith College School for Social Work, Adjunct Assistant Research Professor at the Derner Institute for Advanced Psychological Studies, Adelphi University, and Adjunct Lecturer and Clinical Supervisor in, Doctoral Program, Department of Clinical Psychology, University of Massachusetts Amherst. He is a past president of the Western Massachusetts/Albany Association for Psychoanalytic Psychology, Local Chapter, Society for Psychoanalysis and Psychoanalytic Psychology (39), American Psychological Association, and was a founding member and faculty, Post Graduate Fellowship Program-West, MIP. For the past 32 years, he has maintained an independent clinical practice in psychotherapy, psychoanalysis, and consultation in Amherst, MA. Dr. Ellenhorn is a musician, working primarily in jazz settings around Western Massachusetts.