Cariello worked on his first comic book, "Dagon, the Worlds of HP Lovecraft," while attending the Joe Kubert School of Cartoon and Graphic Art.
When Pat Garrahay moved from Marvel to DC, he offered Cariello pencilling duties on Deathstroke.
At DC he also did work on Guy Gardner, Steel, Wonder Woman, Green Lantern, The Flash, Young Heroes in Love, Blue Beetle, Batman, and Azrael, among others.
When work slowed down, he got a teaching job at the Kubert School and taught several courses over 7 years.
He recently finished the eighth installment of his Son of Samson series with writer Gary Martin for Zondervan.