He began his voice-over work in 1978 when he moved to Los Angeles. His first role was as a salesman in an episode of Richie Rich for Hanna-Barbera. Ross has voiced radio and television commercials for companies including Wal-Mart, AT&T, Volkswagen, Coca-Cola, Mattel, Goodyear, Disney, Hoover, Anheuser-Busch, Southwest Airlines, and Kelloggs, and has done promos for CBS, NBC, ABC, TBS and Fox Kids, using an American accent in all performances.