(written from a Production point of view)
He has made several appearances as Army Sergeant Dixon on the television series Dr. Quinn, Medicine Woman. That show's regular cast members includes Barbara Babcock, Joe Lando, Chad Allen, and Frank Collison. De Zarn has also appeared in an episode of Quantum Leap, starring Scott Bakula and Dean Stockwell, and an episode of 7th Heaven, starring Catherine Hicks and Stephen Collins.
His motion picture credits include Tales from the Crypt Presents: Demon Knight (1995, with William Sadler, Dick Miller, John Schuck, and John Larroquette, Fight Club (1999, with David Andrews), and Spider-Man (2002, playing Kirsten Dunst's father).