Tab attended USC Film School and has been a working screenwriter since 1983. His breakthrough came with a writing credit on Gorillas in the Mist, for which he received an Academy Award nomination. Tab spent nearly ten years in the Disney machine, writing such animated movies as Hunchback of Notre Dame, Tarzan, Atlantis: the Lost Empire and Brother Bear. During that time, he also wrote and directed Last of the Dogmen, a western fantasy starring Tom Berenger and Barbra Hershey. Tab has written several Warner Bros DC animated screenplays, including Green Arrow, Batman/Superman: Apocalypse and Batman: Year One.