Mark Helfrich is an ACE (American Cinema Editor)-certified film editor. He has edited over thirty films, such as the cult classic Showgirls (1995) with Mark Goldblatt. Helfrich is also the primary editor for director Brett Ratner's films, such as Money Talks (1997), Rush Hour (1998), The Family Man (2000), Rush Hour 2 (2001), Red Dragon (2002), and After the Sunset (2004), X-Men: The Last Stand (2006) with Mark Goldblatt and Julia Wong. After that, he directed his first feature, Good Luck Chuck, using Julia Wong as his editor.
He has also edited with Brett Ratner's direction a version of the Bollywood film production titled Kites:The Remix aka Kites (film) (2010), and he edited the pilot episode for Prison Break, an American based TV prison drama series produced by Brett Ratner. He also edited Brett Ratner's music video "Beautiful Stranger" for Madonna.