Wessler was one of at least five staff writers (officially titled editors) under editor-in-chief Stan Lee at Marvel's 1950s forerunner, Atlas Comics.
Wessler began writing for Atlas Comics in November 1950 when he turned in the six-page story "The Mad Monk" about the historical figure Grigori Rasputin, published in Amazing Detective Cases #6 (May 1951). He soon became Atlas' primary crime fiction writer, often scripting entire issues of All-True Crime, Amazing Detective Cases, Crime Can't Win, Crime Exposed, Crime Must Lose, Justice and Kent Blake of the Secret Service. Going on staff in 1952, he became a member of the Atlas bullpen with fellow writers Hank Chapman, Ernie Hart, Paul S. Newman, Don Rico and, on teen-humor comics, future Mad cartoonist Al Jaffee. Wessler wrote horror/fantasy stories for such titles as Adventures into Terror, Adventures into Weird Worlds, Astonishing, Mystic and Suspense, later adding to his body of work such war comics as Battle, Battle Action, Battlefield, Combat and Men's Adventures.
In 1953, EC Comics recruited Wessler, Jack Oleck, Daniel Keyes and other writers. Wessler contributed a large number of stories to EC's famed horror titles Tales from the Crypt and The Vault of Horror—writing the entirety of Tales from the Crypt #45 (Jan. 1955). He wrote as well for EC's Aces High, Crime SuspenStories, Impact, Piracy, Shock SuspenStories and Weird Science-Fantasy.
Carl Wessler in the Grand Comics Database: