Colonel Dean Ridgway Hanson was commissioned an Infantry Officer upon graduation from Officer Candidate School Class 22-69, 22 August 1969. His first duty assignment was as Platoon Leader, Headquarters Company, 1st Battalion, 41st Infantry Regiment, 2nd Armored Division. | His subsequent duty assignments include: Company Commander, A Company, 1st Battalion, 41st Infantry Regiment, 2nd Armored Division; Executive Officer, C Company, 1st Battalion, 41st Infantry Regiment, 2nd Armored Division; S-3 Controller, G-3 75th USA MAC; Personnel Management Officer, G-1 75th USA MAC; Battalion Controller, Gp 07E 75th USA MAC; Personnel Controller, Gp 07E 75th USA MAC; Combat Force Coordinator, Headquarters Company Combat Force, 75th USA MAC; Headquarters Commandant, 75th USA MAC; Infantry Battalion Command Controller, Gp 07C 75th USA MAC; Personnel Administration Controller, Gp 07C 75th USA MAC; Chief Operations, Gp 08F USA MAC; Command Controller/Deputy Mobilization Branch, 75th Division (E); Chief Controller/Observer Mobilization Branch, 75th Division (E); CDR, 1st Battalion, 95th Regiment, 4th Brigade (Basic Combat Training) 95th Division (IT); CDR, 2nd Battalion, 95th Regiment, 2nd Brigade (Basic Combat Training) 95th Division (IT) (reflaged 1/378th Oct. 1996); CDR, 1st Battalion, 378th Regiment, 2nd Brigade (Basic Combat Training) 95th Division (IT); Individual Ready Reserve, Attached to: 417th IMA DET (R&D); Chief, Collection Management Branch, 1st SEG, 75th Division (TS); Chief, Combat Service Support Branch, 1st SEG, 75th Division (TS); Chief, Task Force “A”, 1st SEG, 75th Division (TS)