[8] He made his first professional sale in 1969;[9] that same year, through a mutual association with a Marvel Comics mail-order firm, he was taken on as a production assistant to Jack Kirby.

[citation needed] After leaving Kotter in 1977 and amicably ending his partnership with Palumbo, Evanier wrote for and eventually ran the Hanna-Barbera comic book division.

He is most noted in animation for his work on Garfield and Friends, a seven-season series for which Evanier wrote or co-wrote nearly every episode and acted as voice recording director.

[12] Since 2008, Evanier has been the co-writer and voice director of The Garfield Show, which won a Daytime Emmy Award for Outstanding Performer in an Animated Program for June Foray.

[14] He has produced a number of comic books, including Blackhawk, Crossfire and Hollywood Superstars (with Dan Spiegle),[10] Groo the Wanderer (with Sergio Aragonés),[15] and The DNAgents (with Will Meugniot).

They usually include Quick Draw!, which pits fast cartoonists against one another to respond with drawings to challenges Evanier throws at them; the Annual Jack Kirby Tribute Panel, Cover Story (artists discussing the skills involved in creating covers for comic books), and several panels about the art of providing voices for animated cartoons.

[citation needed] In April 2022, Evanier was reported among the more than three dozen comics creators who contributed to Operation USA's benefit anthology book, Comics for Ukraine: Sunflower Seeds, a project spearheaded by IDW Publishing Special Projects Editor Scott Dunbier, whose profits would be donated to relief efforts for Ukrainian refugees resulting from the February 2022 Russian invasion of Ukraine.