[citation needed] Shortly after graduating from KU, he was hired as a literary consultant by Hollywood talent agency Creative Management Associates.
[citation needed] As Vice President of Creative Affairs at boutique studio Marble Arch Productions, his projects included The Muppet Movie, Sophie's Choice, and On Golden Pond.
[citation needed] Parker turned to producing, with films My Stepmother is an Alien directed by Richard Benjamin and starring Dan Aykroyd and Kim Basinger, Thursday's Child with Gena Rowlands and Rob Lowe, Legs with Gwen Verdon and John Heard, and The Fighter with Gregory Harrison.
[1] During the 1990s he began to focus on screenwriting, with 18 produced movies and miniseries, including Joan of Arc with Leelee Sobieski and Peter O'Toole, and Nuremberg with Alec Baldwin and Christopher Plummer .
Other writing credits include Night Ride Home with Rebecca De Mornay, Keith Carradine and Ellen Burstyn; The William Coit Story with Bonnie Bedelia and Neil Patrick Harris; The Price of Love with Peter Facinelli and Jay R. Ferguson; Gone in a Heartbeat with James Marsden; and Gargantua with Emile Hirsch and Adam Baldwin.