Hitchcock is an alumnus of The Groundlings, a Los Angeles-based improvisational and Sketch comedy theater troupe. Although he retired from the theatre's Main Stage Company in the mid 1990s, Hitchcock still comes back regularly to perform in The Groundlings’ all-improv shows Cookin' with Gas and The Crazy Uncle Joe Show.
Hitchcock's other writing credits include the comedy films House Arrest (1996), and The Ultimate Christmas Present (2000) as well as the critically acclaimed drama Where the Day Takes You (1992), which marked the film acting debut of Will Smith and also featured Dermot Mulroney, Lara Flynn Boyle, Sean Astin, Balthazar Getty, and Christian Slater. Where the Day Takes You was nominated for the "Critics Award" at the Deauville Film Festival, and Mulroney won "Best Actor" at the Seattle International Film Festival.
In 1999, Hitchcock became a Writer for the FOX late-night comedy series MADtv, and became one of the series' producers in 2001. He also played the role of Simeon Dyson, an obnoxious, drug-abusing game show announcer on the recurring MADtv Sketch, "The Lillian Verner Game Show". During his tenure, the MADtv writing team was nominated for three Writers Guild of America Awards in the Comedy/Variety category (in 2003, 2004, and 2005).
In 2008, he was inducted into the Lyons Township High School Hall of Fame.
Other film appearances include Magic Camp (2018), Bridesmaids (2011), Super 8 (2011), Operation: Endgame (2010), Smiley Face, Wild Hogs (2007), Joss Whedon's Serenity (2005), Pretty Persuasion (2005), Heartbreakers (2001), and Happy, Texas (1999).
