 Marsh has been and continues to be a driving force behind several animation projects, working for over six seasons on the animated television series "The Simpsons".Marsh continued to work on other animated television series, including "King of the Hill" and "Rocko's Modern Life," before moving to England in 1996.While in England, Marsh worked on several animated programs, including "Postman Pat" and "Bounty Hamster," and worked for BKN New Media Ltd. to produce several feature films.