However, when Al Brodax brought both his Krazy Kat and Beetle Bailey cartoons to Australia for production, Campbell was recruited to work on the project.

Due in part to the enormous success of the program, Campbell was hired by Bill Hanna (of Hanna-Barbera fame) and relocated to Hollywood, California.

In Hollywood, he would go on to work on a wide array of animated television series including, but not limited to: The Smurfs, The Jetsons, The Flintstones, Scooby-Doo, Rugrats, Rocket Power, and Ed, Edd n Eddy.

The 1990s took Campbell to Disney Animation, where he worked on several cartoons, including: Bonkers, Goof Troop, The New Adventures of Winnie the Pooh and Darkwing Duck.

In retirement, Campbell lived in the Phoenix, Arizona area and created original pop art paintings,[7] based upon the films he was involved with in one capacity or another.