A naval aviator and attack pilot, Cmdr. Sheehan served in VA-115 at Naval Air Facility Atsugi, Japan and aboard USS Independence (CV-62). In 1995, he joined Attack Squadron 196 (VA-196) for the final Intruder deployment, serving as a forward air controller/airborne. He transitioned to the EA-6B Prowler, and served two tours with Electronic Attack Squadron 141 (VAQ-141) as Prowler tactics instructor and night vision goggles instructor. He has logged over 3,500 flight hours and 750 arrested landings on nine aircraft carriers. Ashore, Sheehan served on the Joint Staff in J-5 strategy, and as engagement lead for South and East Africa at U.S. Naval Forces Africa in Naples, Italy.