Discovered by Marvel at a 1987 comic convention, Ron was hired on the spot! He spent the next 6 years penciling the Silver Surfer (volume 3), during which the world was re-introduced to one of Marvel's greatest villains, Thanos. This period would also see Ron taking over art duties from George Perez on Infinity Gauntlet. He was also the artist on the subsequent follow up series Infinity War and Infinity Crusade.
Ron has also worked on Captain America, Rann/Thanagar: Holy War, Thanos Quest, Spider-Man Unlimited, X-Men 2099, Anita Blake: Guilty Pleasures, Sonic the Hedgehog, and much more.