Co-founder of influential early gay porn studio and distribution company Hand in Hand Films, which operated from 1972 to the early '80s, and their primary director and frequent cinematographer. His films were a mix of dramas, comedies , and stranger/artier far and were typically ambitious, character-focused narratives portraying gay NYC life, along with a few more straight-forward sex films. According to his partner and Hand in Hand editor/co-founder Robert Alvarez, through the body of films he made, Jack sought to create a literature that future viewers could continue to reference over the years for insight into gay culture of the era.