Schenk has been in practice as a clinical psychologist since 1978. An Approved Consultant with ASCH for many years, he is the author of two books and co-author of numerous journal articles that stemmed from his large MMPI-2 outpatient research study back in the 1990s and has written for lay audiences in publications such as Family Circle. Past-life regression therapy has been part of his work since 1987. His journal articles have appeared in AJCH and AJCEH, and his book on the topic was released in 2006 by Crown House Publishing.