 Switching to animation at age 14, he was discovered by animators Corny Cole (Looney Tunes) and Duane Crowther ("Yellow Submarine"), and was mentored by longtime Disney animator Amby Paliwoda.Clark was one of the original animation and layout artists on the first three seasons of "The Simpsons", and has gone on to animate on various other animated projects such as several "Peanuts" TV specials for Bill Melendez productions, and many special effects feature films, such as "Forrest Gump", "The Mask", "Godzilla", "", "Big Trouble in Little China", "Cool World", and "".Clark has produced and directed The Kustomonsters animated show for the web and TV through Cheeky Entertainment, and has aired on AMGTV in U.S. syndication and also streaming TV service OSI74.