A few nice Jack Kirby images I found:
OMAC (One-Man Army Corps) was originally a superhero comic book created by Jack Kirby and published by DC Comics. OMAC was a corporate nobody named Buddy Blank who was changed by an A.I. satellite called Brother Eye into the super-powered OMAC.
The character, along with the Brother Eye satellite, was recently rebooted by Greg Rucka for the Infinite Crisis storyline. Although OMACs are now cyborgs who take over human bodies via a virus (created from Brainiac-13-derived nanotechnology acquired by the U.S. Department of Defense and Lexcorp, which was then secretly introduced into general vaccine supplies) in order to assassinate any and all beings with superpowers, they still retain OMAC’s familiar crest, now turned into simple additional plating to cover the human brain underneath, and Brother Eye symbol on their chest. The OMACs are featured in the OMAC Project mini-series that leads up to Infinite Crisis.