Matt Hullum (born September 29, 1974) is an American director, producer, writer, actor and visual effects supervisor living in Austin, Texas. He is one of five co-founders and the current chief executive officer of production company Rooster Teeth, which specializes in online content, including live action series, podcasts, animation and machinima, an art using engines from computer and video games to create films.Hullum voices Col. Sarge in the Rooster Teeth-created machinima series Red vs.