Warren has a number of Broadway production directing credits to his name, including Holiday, Summer and Smoke and Misalliance.
Warren's only television credits to date are having directing four episodes of Desperate Housewives Desperate Housewives creator and executive producer Marc Cherry asked Warren to direct an episode of the show's third season having known him previously from the theatre. Warren and Cherry became close friends after Warren gave Cherry his first professional acting job over twenty years ago in a children's musical. Warren hopes to work both in theatre and television in the future:
"I'm very excited by this career change. But it's not permanent, because I love theatre too much."