Starting in 1982, Geof has drawn for Marvel and DC Comics. His first full issue was Daredevil #203, which led to regular series runs on Swords of the Swashbucklers, Conan the King, The ‘Nam, Conan the Barbarian, Suicide Squad, Dr. Strange and Namor, along with numerous short runs and one-offs on titles such as Spider-Man and Thor.
in 1999, Geof branched out into film, doing concept art under Patrick Tatopoulos on Battlefield Earth. This gave him recognition in the Montreal film production community, and since then he has worked on over 60 productions, doing everything from storyboards for movies and animation to prop design to set decoration paintings and posters. Recently, Geof has done concept work on X-Men: Apocalypse.
Recently, Geof was recruited to teach part-time what he has learned from his years at the drawing board at Algonquin College in Ottawa, Ontario in the Illustration and Concept Art Program. He also appears at numerous comic book conventions with his wife Amanda Muise.