Greg is a writer, editor, and story consultant focused on creating comic books and related media.
His career began at DC Comics in 2008, eventually joining the editorial staff of the Vertigo imprint. At Vertigo, he worked on a number of titles including: FABLES (and the spin-off series FAIREST), THE UNWRITTEN, FBP: FEDERAL BUREAU OF PHYSICS, SWEET TOOTH, THE KITCHEN, AMERICAN VAMPIRE, 100 BULLETS: BROTHER LONO and many others.
As a writer, Greg formed Poison Press collective with Monica Gallagher and Tim Fish. In September 2018, they debuted a new 12-page historical gay romance by Greg and Tim at Thought Bubble in Leeds, England.
Greg also collaborated with Tim Fish, Michael DiMotta and Sal Cipriano on a story for the WHERE WE LIVE anthology by Image Comics benefiting the victims of the Las Vegas shooting.