Jim Mooney's career as a comic book artist began in the Golden Age of comics, in 1940. Mooney started at Ace and then went to Timely Comics where he met Stan Lee for the first time. At Timely he did his first funny animal work. He worked as a freelancer since there wasn't a great deal of work for him at Timely. So he started to work at Fiction House where he worked on 'Camilla' and 'Suicide Smith'. Mooney worked for many of the early Golden Age comic book publishers (namely Fox Features, Ace Comics, Quality Comics, Timely Comics, Fiction House and the famous Eisner-Iger Shop).
Elvira #14 (1994)
Jim Mooney had found a professional home at DC Comics where he stayed for the next 22 years, from 1946 until 1968. He left DC when they changed their style and no longer had any work for him. Mooney worked on many of DC's (and Marvel's) top-selling characters, such as 'Superboy', 'Supergirl' and 'Batman'. He then began work on Marvel's 'Spider-man'. He has done continuing work on 'Elvira' for Claypool Comics and inked a retro 'Lady Supreme' story for Awesome Entertainment.