Jonas "Jonah" Hale was one of the top four Republic Oil and Natural Gas executives, apparently head of their research division. He remained with the company in a similar position as it became Roxxon Oil.
"Captain" Hale was in charge of the attempt to mine Vibranium from an Atlantic Ocean island. He masqueraded as a U.S. military Captain during the attempt, but when Iron Man and the Sub-Mariner intervened, he destroyed the island with explosives and escaped. A "Lieutenant" Grange, and someone known as Morgan were the only identified underlings of Hale's during this operation.
Hale ordered Michael Trudeau to disrupt Stark International's investigation of the Star Well I Allentown disaster. When Iron Man found Star Well I anyway, Hale ordered its destruction, but Iron Man disabled the destruct device.
Hale twice encountered Tony Stark at a Dallas, Texas engineering convention, first pulling CTE's Augustine Cross away from Stark (and slapping a Roxxon: Your Energy Friend" button on Tony while doing so), and then the following night telling Stark that he wasn't at all sorry to hear that Iron Man had recently been embarassed (in a fight with the Raiders).
Hale led the development of a new Sunturion project, which both resurrected Sunturion and led to the creation of a new Sunturion, code-named Stratosfire. After Hale ordered the death of one of Stratosfire's friends, she became unbalanced, and Hale was ultimately forced to destroy her using a remote control "Zed device."
When Tony Stark was crippled in a shooting, Hale attempted to take advantage of this by hiring the Fixer to destroy a Sonic Scanner that Stark had developed for locating oil deposits. The Fixer destroyed two-thirds of the project but failed to destroy the last third.
Hale headed up Roxxon's development of Nuform, an artifical vibranium. Though fully aware that no permanent solution existed to the product's destabilization, Hale chose to pursue marketing of it, trusting Roxxon to develop a final solution in the future.
Hale contributed Roxxon money and technology to the Sphinx's project to attempt to duplicate/steal the powers of young super-humans. Though the Sphinx was ultimately defeated by Spider-Man and the New Warriors, Roxxon presumably gathered very valuable genetic enhancement technology/knowledge during the process.