Jim Valentino was born in the Bronx, New York. Valentino began his career working on mini-comics in the early eighties. These stories, many of them later collected in the book 'Vignettes', were mostly autobiographical, inspired by underground comix masters R. Crumb and Vaughn Bode. He changed directions a few years later when he signed on to do his fondly remembered superhero parody 'Normalman' for Aardvark-Vanaheim. Valentino began working for Marvel in the late eighties and early nineties on series like 'What If?' and 'Guardians of the Galaxy'.
Then, in 1992, Valentino left Marvel when joined together with Todd McFarlane, Rob Liefeld, Whilce Portacio, Erik Larsen and Jim Lee to form Image Comics. As one of their artists, he has been involved with Image from the start. He produced a small line of superhero books through the company, including his own 'ShadowHawk' as well as the notorious Alan Moore-headed '1963'. Five years later, Valentino reevaluated his creative interests and returned to his roots with his emotional, semi- autobiograpical comic 'A Touch of Silver' and other alternative comics.