Colonel David Langley was commissioned an Air Defense Artillery Officer upon graduation from Officer Candidate School Class 1-77, 12 April 1977. His first duty assignment was as Executive Officer, C Company, 1st Battalion, 155th Infantry, Brookhaven, Mississippi. | His subsequent duty assignments include: Commanding Officer, B Company, 1st Battalion, 155th Infantry, Natchez, Mississippi; Operations Staff Officer, Headquarters Company, 1st Battalion, 155th Infantry, McComb, Mississippi; Logistics Staff Officer, Headquarters and Headquarters Company, 1st Battalion, 155th Infantry, McComb, Mississippi; Personnel Staff Officer, Headquarters and Headquarters Company, 106th Support Battalion; Support Operations Officer, Headquarters and Headquarters Company, 106th Support Battalion, Monticello, Mississippi; Executive Officer, Headquarters and Headquarters Company, 106th Support Battalion, Monticello, Mississippi; Material Management Officer, Office of the Director of Logistics, Jackson, Mississippi; Commanding Officer, 106th Battalion, Headquarters, State Command Area; Surface Maintenance Management Officer, Office of the Director of Logistics, Headquarters, State Area Command, Jackson, Mississippi; Commanding Officer, 114th Area Support Group, Hattiesburg, Mississippi; J-4, Director of Logistics, Joint Force Headquarters, Mississippi, National Guard, Jackson, Mississippi. | Colonel Langley's military awards and decorations include: Meritorious Service Medal w/ 2 Oak Leaf Clusters, Army Commendation Medal w/ 2 Oak Leaf Clusters, Army Achievement Medal w/ Oak Leaf Cluster, National Defense Service Medal w/ Service Star, Armed Forces Expeditionary Medal, Humanitarian Service Medal, Armed Forces Reserve Medal, Overseas Service Ribbon.