Sean B. Cronin attended Naval Aviation Flight Training in Pensacola, Florida and was designated a Naval Aviator in 1988. He completed Fleet Replacement Training in the P-3 Orion aircraft at Naval Air Station Moffett Field in Mountain View, California. Sean was a designated Mission Commander, Patrol Plane Commander and Instructor Pilot during his active service, where he accumulated more than 2,500 hours flight time in the P-3 aircraft. He continues to serve his country as a Commander, USNR, retired reserve status.