Steeplejack is the name of two fictional characters in the Marvel Universe.

Steeplejack I
Publication information
PublisherMarvel Comics
First appearanceLuke Cage, Power Man #18 (Apr 1974)
Created byLen Wein and George Tuska
In-story information
Alter egoJake Mallard

Jake Mallard

Jack Mallard was the first criminal to go by the name Steeplejack. He died fighting Power Man.

Steeplejack II
Publication information
PublisherMarvel Comics
First appearanceMs. Marvel #14 (Feb 1978)
Created byChris Claremont and Carmine Infantino
In-story information
Alter egoMaxwell Plumm

Maxwell Plumm

Maxwell Plumm took the designs and outfit of the first Steeplejack. He fought Ms. Marvel and lost. He attended the final bash at the “Bar With No Name,” and was shot to death by the Scourge of the Underworld.

Equipment

Steeplejack’s body suit offers protection from physical attacks. His multipurpose acetylene gun could fire force blasts, energy blasts, a wire slipknot, and heat and light.