"[3] Posin graduated from the University of Southern California (USC) in 1993, which he says was the "epilogue" of film school after growing up with his father as a mentor.
[2][3] While at USC he met filmmaker Billy Wilder, who encouraged Posin to travel, and subsequently lived in Ireland, Israel, France and Spain.
When Posin returned to Los Angeles, California, he began to work at a talent agency where he made connections with agents, writers and producers.
[3] He met writer Zac Stanford, whom he asked to write the screenplay for The Chumscrubber, and the two planned to shoot the film with their own money.
[3] The Chumscrubber, starring Jamie Bell, Glenn Close and Ralph Fiennes, was filmed in April 2004 with financing from Bob Yari's production company El Camino Pictures.