Along with publisher Jenette Kahn and managing editor Dick Giordano, Levitz was responsible for hiring such writers as Marv Wolfman and Alan Moore, artists such as George Pérez, Keith Giffen, and John Byrne, and editor Karen Berger, who contributed to the 1980s revitalization of the company's line of comic book heroes.

He was an avid reader as a child,[2] and read the works of writers including Agatha Christie, Dorothy L. Sayers, and Ed McBain.

[citation needed] During the course of his research for The Comic Reader, Levitz became well known at the offices of DC Comics, where in December 1972, editor Joe Orlando gave him his first freelance work, initially writing text pages and letter pages, and later working as a per diem assistant editor before writing stories.

Levitz wrote All-New Collectors' Edition #C-55 (1978), a treasury-sized special drawn by Mike Grell, in which longtime Legion members Saturn Girl and Lightning Lad were married.

[12][13] Levitz and artists James Sherman and Joe Staton crafted "Earthwar" a five-issue storyline in Superboy and the Legion of Super-Heroes #241–245 (July–Nov.

[15] Comics historian Les Daniels observed that "Working with artist Keith Giffen, Levitz completed the transformation of Legion into a science-fiction saga of considerable scope and depth.

[19] He wrote the Justice Society series in All Star Comics during the late 1970s and co-created the Earth-2 Huntress with artist Joe Staton.

[2] In 2006, Levitz returned to writing the Justice Society with issue #82 of JSA, completing that volume before writer Geoff Johns' relaunch.

"[26] His 75 Years of DC Comics: The Art of Modern Mythmaking (ISBN 9783836519816) was published by Taschen America, LLC, in November 2010.

[27] In addition to Legion of Super-Heroes, Levitz wrote the Worlds' Finest series, which was initially drawn by George Pérez and Kevin Maguire.

[33] He wrote a new five-page story titled "The Game", which was drawn by Neal Adams, for the Action Comics: 80 Years of Superman hardcover collection.