Paul has provided 30 years of leadership in NY and NJ developing quality, hospital-based and free-standing mental health programs for underserved populations. He was appointed as a team member to write treatment standards for the State of NJ on co-occurring conditions of mental illness and addiction. For the past 25 years he has had a private practice in psychotherapy specializing in trauma, and also is certified in Compassionate Bereavement Counseling. Additionally he is a pioneer in Zen Buddhism, known as Roshi Paul Genki Kahn, a Buddhist priest, a lineage holding Zen Buddhist teacher,  and co-founder with his wife, Roshi Monika Genmitsu Kahn, of the Zen Garland Order.