John Hans Rathauser, Ph.D. and Jonathan J. Entis, Ph.D.

John Hans Rathauser, Ph.D. is a licensed psychologist with over 35 years of clinical experience. Following completion of his doctorate in clinical psychology at the California School of Professional Psychology – Los Angeles, his postdoctoral experiences began with a five-year period of training at the Postgraduate Center for Mental Health in New York. In 1994 John Rathauser entered into training with Habib Davanloo, M.D. in Montreal, Canada, spending eight years in Dr. Davanloo’s Core Training Group. From 2002-2016 he continued to attend annual weeklong metapscyhology conferences, which Dr. Davanloo held in Montreal, Canada. John Rathauser’s private practice in Kendall Park, N.J. is largely devoted to the practice of Davanloo’s Intensive Short-Term Dynamic Psychotherapy (IS-TDP), as well as providing training to mental health practitioners, which is additionally offered in Los Angeles based core training programs in IS-TDP as well as online monthly training sessions. He has given numerous presentations on IS-TDP nationally and internationally and is a supervisor for the International Experiential Dynamic Therapy Association (IEDTA). At this time he is engaged in co-writing two books on IS-TDP with Mikkel Reher-Langberg entitled Fundamentals of Davanloo’s ISTDP, and The Clinical Application of Davanloo’s ISTDP. Contact John at

Jonathan Entis, PhD, is a psychologist in private practice in Cambridge, Massachusetts. He is licensed in both Massachusetts and New York. He is on the faculty of Harvard Medical School, where for the past three years he has taught and supervised in ISTDP. He presented at the IEDTA international conference in Boston in 2019. He completed a 3-year core training in ISTDP with Patricia Coughlin and has been in weekly supervision with both Patricia Coughlin, PhD and John Rathauser, PhD. Contact Jonathan at

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