[1] He deployed to South Korea, where he served as a fighter pilot in the 428th Fighter-Bomber Squadron, flying twenty-five combat missions during the Korean War.

In March 1954, he was assigned to the 517th Strategic Fighter Wing at the Malmstrom Air Force Base in Montana.

After graduating from the Air Force Institute of Technology in 1959, Driessnack remained at Wright-Patterson to work as a research and development staff officer on the Douglas C-133 Cargomaster and Lockheed C-141 Starlifter programs.

[1] Driessnack graduated from the Naval War College in 1970 and returned to the Office of the Deputy Chief of Staff, Comptroller at the Air Force Systems Command as the director of cost analysis.

He served as the comptroller for the Aeronautical Systems Division at Wright-Patterson Air Force Base from 1972 to August 1974.