What companies does the creator of Heroes for Hire work for?
Heroes for Hire:  The team first appeared in "Power Man and Iron Fist" #54 (December 1978), and was created by Ed Hannigan and Lee Elias. Ed Hannigan: Ed Hannigan (born August 6, 1951) is an American comics artist, writer, and editor for both Marvel Comics and DC Comics.
Marvel Comics and DC Comics