Keith graduated from Montville High School, Oakdale Connecticut in 1988. He is a 1994 graduate of The Joe Kubert School of Cartoon and Graphic art. Keith began working professionally as a comic book inker during his second year at the Kubert School.
Titles he has contributed to (as writer) include: JSA, Green Lantern Corps, and World War III. As an artist/inker, his work has appeared in many titles, most notably JSA, Firestorm, and Superboy.
Recently he wrote Adolescent Radioactive Black Belt Hamsters, when the license was acquired by Dynamite Entertainment.
Upcoming work includes Ghostbusters for IDW Publishing and The Mighty, a creator-owned title for DC Comics, co-written with Peter Tomasi.
Keith currently lives in Mansfield Center, Connecticut.