Command Sgt. Maj. David O. Nelson assumed duties as the command sergeant major of the 401st Army Field Support Brigade June 2021.
He enlisted in the Army in 1993 and attended Basic Training and Advanced Individual Training as a 63S heavy wheeled vehicle mechanic at Fort Jackson, South Carolina. His initial assignment was with the 46th Engineer Battalion, Fort Rucker, Alabama, where he served as a recovery specialist and heavy wheeled mechanic.
Upon completing his tour at Fort Rucker, CSM Nelson relocated with the 46th Engineer Battalion to Fort Polk, Louisiana, where he was promoted to specialist, and served as a heavy wheeled vehicle mechanic and recovery team leader. CSM Nelson participated in railhead operations at Joint Readiness Training Center Fort Polk, as well as convoy support to the shipyard in Wilmington, North Carolina. While at Fort Polk, he deployed with his company in support of Operation Uphold Democracy from 1994 to 1995. He was then reassigned to Charlie Company, 52nd Aviation Regiment, Camp Humphreys, South Korea, where he served as a section leader and was later promoted to sergeant. After completing his 12-month tour in South Korea in 1997, he was reassigned to the 3rd Battalion, 27th Field Artillery, Fort Bragg, North Carolina, where he served as the Primary heavy wheeled maintenance supervisor and recovery team leader.
CSM Nelson volunteered to deploy in support of Operation Southern Watch in 1999. In 1999 he also re-classified to a light-wheeled vehicle mechanic at Fort Jackson, and in 2000 he was reassigned to the 2nd Ranger Battalion, 75th Ranger Regiment, Joint Base Lewis-McChord, Washington, where he served as maintenance section leader. While at JBLM, he was promoted to staff sergeant and assumed responsibility as the motor sergeant for the tactical vehicle and equipment complex. Here he deployed in support of Operation Enduring Freedom from 2003-2006 and was promoted to sergeant first class. From 2006-2009 he deployed in support of Operation Iraqi Freedom. CSM Nelson was selected for master sergeant and reassigned to the Military District of Washington. He served as the maintenance supervisor, first sergeant, and toured overseas in support of military operations. In 2015, CSM Nelson got selected to attend the U.S. Army Sergeants Major Academy at Fort Bliss, Texas. Upon completion of USASMA in 2016, CSM Nelson was assigned to 10th Special Forces Group (A), Group Support Battalion, Fort Carson, Colorado. While serving as the GSB command sergeant major, he supported numerous national level training exercises overseas, host nation partners conducting real world operations, and a SF line battalion conducting combat operations in Afghanistan. In 2018, CSM Nelson was selected to serve with the 82nd Airborne Division Sustainment Brigade at Fort Bragg.
CSM Nelson’s military education includes all U.S. Army NCO education courses, John F. Kennedy Special Warfare Instructor Trainer Course, Master Resiliency Trainer Course, Survival Evasion Resistance Escape School, and Jumpmaster Course.
CSM Nelson is finishing his associate degree in business from Excelsior University.
His awards include the Bronze Star Medal (3rd award), the Defense Meritorious Service Medal, the Meritorious Service Medal (2nd award), the Army Commendation Medal (5th award), the Army Achievement Medal (4th award), the Joint Meritorious Unit Award (2nd Award), Good Conduct Medal (5th award), National Defense Service Medal (2nd award), Armed Forces Expeditionary Medal, the Iraq Campaign Medal (one bronze service star), the Afghanistan Campaign Medal (one bronze service star), the Global War on Terrorism Expeditionary Medal, the Global War on Terrorism Service Medal, the Korea Defense Service Medal, the Armed forces Service Medal, the Humanitarian Service Medal, the United Nations Medal, the NCO Professional Development Ribbon (3rd award), the Army Service Ribbon, the Overseas Service Ribbon (4th award), the Drivers Badge (wheel), the Master Parachutist Badge, the Air Assault Badge Combat Action Badge, Ranger Tab, and The Samuel Sharp Award.