Grant Frederick Timmerman (February 19, 1919 – July 8, 1944) was a United States Marine who posthumously received the Medal of Honor for his heroic actions during World War II.

He played the saxophone in the high school band for two years, enjoyed hunting small game, and read, wrote, and spoke French and Russian.

After a few weeks duty there, Pvt Timmerman went to Mare Island Naval Shipyard, California, where he boarded the old China transport, USS Henderson.

Assigned to the Motor Transport Company of the 4th Marines, Pvt Timmerman served as a truck driver and as a motorcycle dispatch rider.

Returning to Mare Island in April 1941, he was given duty at the Naval Prison there and stayed at that post until his discharge at the completion of his four-year enlistment on October 27, 1941.

The Medal and also a Bronze Star earned earlier in the Saipan campaign, were presented to his parents on July 8, 1945, the first anniversary of his death, in their home by Col Norman E. True of the Marine Barracks in Great Lakes, Illinois.

Timmerman's awards include: The President of the United States takes pride in presenting the MEDAL OF HONOR posthumously to for service as set forth in the following 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 Second Battalion, Sixth Marines, Second 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, Sergeant Timmerman maintained steady fire from his antiaircraft sky mount machine gun until progress was impeded by a series of enemy trenches and pillboxes.

His exceptional valor and loyalty in saving his men at the cost of his own life reflect the highest credit upon Sergeant Timmerman and the United States Naval Service.