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Jim Salicrup began his comics career at Marvel Comics when he was 15, having written to Roy Thomas offering to be "a Marvel slave"; Thomas and Sol Brodsky hired him to be a messenger transporting original art to the offices of the Comics Code Authority for approval. He subsequently worked his way up to editor. A Marvel employee for twenty years, he edited The Avengers, The Uncanny X-Men, and The Fantastic Four. In 1987, Salicrup became the editor of The Amazing Spider-Man and oversaw the "Kraven's Last Hunt" storyline. He is credited with coming up with the idea of running "Kraven's Last Hunt" as a crossover through all the Spider-Man titles. He followed this by hiring Todd McFarlane to draw the title. The popularity of McFarlane's work led to the launch of another Spider-Man title, Spider-Man, which Salicrup edited as well. Salicrup was the editor of Marvel Age magazine for eight years. He wrote licensed Marvel comic adaptations of Transformers, Sledge Hammer!, and The A-Team. He also wrote the novelty comic book printed on a toilet paper roll for The Amazing Spider-Man and the Incredible Hulk.

In 1992, Salicrup became the editor-in-chief of Topps Comics, where he edited Bram Stoker's Dracula, X-Files, The Lone Ranger and Tonto, Zorro, Lady Rawhide, a line of Jack Kirby superhero titles, Ray Bradbury Comics, and more.

At Stan Lee Media, Salicrup served as senior writer/editor, as well as the writer and voice of "Stan Lee's Evil Clone".

Salicrup is the editor-in-chief at Papercutz, publishers of Nancy Drew, The Hardy Boys, Tales From The Crypt, Totally Spies!, and Zorro graphic novels.

He is a trustee at the Museum of Comic and Cartoon Art (MoCCA).