He held a variety of senior NCO positions culminating in his assignment as the Sergeant Major of the Army. He previously held the senior enlisted position as Command Sergeant Major of the United States Central Command, MacDill Air Force Base, Florida. Other assignments he held as Command Sergeant Major were: the 1st Battalion, 5th Air Defense Artillery, Fort Stewart, Georgia; Commandant, 24th Infantry Division Noncommissioned Officer Academy, Fort Stewart; and the 24th Division Artillery, Saudi Arabia and Iraq; the 2d Infantry Division, Korea; and First U.S. Army, Fort Meade, Maryland.
Throughout his 32-year career, SMA Hall has held every key leadership position including: squad leader, 2d Infantry Division, Korea; platoon sergeant, battalion operations sergeant and battalion intelligence sergeant, 1st Armored Division, Germany; first sergeant, B Battery, 2nd Battalion, 59th Air Defense Artillery, Germany; and drill sergeant, Fort Bliss, Texas. His military education includes Drill Sergeant School, Advanced Noncommissioned Officers Course, First Sergeants Course, and the Sergeants Major Academy, where he served as an instructor upon graduation from class 26. He also served on the staff of the United States Army Training and Doctrine Command, Fort Monroe, Virginia. His experience and expertise distinguished him as the 1979 Army Drill Sergeant of the Year and selection and induction into the prestigious Sergeant Morales Club and the Sergeant Audie Murphy Club.
In retirement, Hall continues to serve the military community and has received numerous awards to include the Outstanding Civilian Service Award. In 2007, he was presented the Doughboy Award for his outstanding contributions to the US Army Infantry.