Colonel Sean T. Hannah was commissioned as an Infantry Officer upon graduation from Officer Candidate School Class 4-87, 20 August 1987. Colonel Hannah’s first duty assignment was Platoon Leader, 3d Armored Division, Kirchgoens Germany. | His subsequent duty assignments include: Company Executive Officer, and Battalion S-3 Air, 3D Armored Division, Kirchgoens Germany and Desert Storm; Battalion S-4, 7th Infantry Division, Fort Ord, CA; Company Commander, Battalion S-4, Acting Battalion S-3, 9th Infantry Regiment (later re-flagged 25th ID), Fort Lewis, Washington and Guantanamo Bay Cuba; Resource Management Officer, Office of the Chief of Staff of the Army, Pentagon; Comptroller Proponency Officer, Office of the Assistant Secretary of the Army (Financial Management and Comptroller), Pentagon; Director, Leadership and Management Programs, United States Military Academy, West Point, New York; and Director, Center for the Army Profession and Ethic (CAPE)-Combined Arms Center, TRADOC, United States Military Academy, West Point, New York. | Colonel Hannah's military awards and decorations include: Bronze Star Medal, Meritorious Service Medal(4 Oak Leaf Cluster), Army Commendation Medal (5 Oak Leaf Cluster), Army Achievement Medal (3 Oak Leaf Cluster), Joint Meritorious Unit Award, Army Valorous Unit Award, Army Superior Unit Award, Coast Guard Meritorious Unit Commendation, National Defense Service Medal (2 Oak Leaf Cluster), Southwest Asia Service Medal-(3 Bronze Stars), Global War on Terrorism Service, Humanitarian Service Medal (2Oak Leaf Cluster), Army Service Ribbon, Overseas Service Ribbon, Kuwait Liberation Medal, Saudi Arabian Liberation Medal, Combat Infantryman Badge, Expert Infantry Badge, Ranger Tab and Airborne Badge, Army Staff Identification Badge.