Jack first studied with Milton Trager in 1986. He is a Trager tutor and teaches Elective classes. He developed and taught a series of Somatics courses for lateral position, in addition to courses in Reiki and interactive craniosacral technique. Jack has a degree in theology. He has long been interested in verbal interaction between therapist and patient. Thus, he offers courses for body therapists combining words, touch, and proprioception to deepen the client's somatic awareness and self-competence about what is happening in their body. In 2004, Jack founded the Trillium Institute, a continuing education venue for body therapists in the U.S. and Japan.