Rank and organization: Sergeant, U.S. Marine Corps. Born: 14 February 1919, Americus, Kans. Accredited to: Kansas. Other Navy award: Bronze Star Medal.
Citation... For conspicuous gallantry and intrepidity at the risk of his life above and beyond the call of duty as tank commander serving with the 2d Battalion, 6th Marines, 2d Marine Division, during action against enemy Japanese forces on Saipan, Marianas Islands, on 8 July 1944.
Advancing with his tank a few yards ahead of the infantry in support of a vigorous attack on hostile positions, Sgt. Timmerman maintained steady fire from his antiaircraft sky mount machinegun until progress was impeded by a series of enemy trenches and pillboxes.