Command Sergeant Major Welch enlisted in the United States Army in June 1977. During his 30 year career, he served in various leadership positions; First Cook, Shift Leader, Dining Facility Manager, Platoon Sergeant, First Sergeant, Division Food Service Sergeant Major and Division G-4 Sergeant Major; Command Sergeant Major of the 17th Corps Support Battalion, 23rd Support Brigade, 19th Theater Support Command, and the Command Sergeant Major for United Nations Command, Combined Forces Command, United States Forces Korea and 8th Army; he concluded his career as the Army G-4 Sergeant Major. His previous assignments were with the 9th Infantry Division, Fort Lewis Washington; 1st Personnel Command, 21st Replacement BN, Rhein Main Germany; ¾ Cav, 25th Infantry Division, Hawaii, Readiness Group Dix, Fort Dix New Jersey; 416th Base Support Battalion, Nuremburg Germany, 108th ADA Brigade, Fort Polk, LA and Fort Bliss, Texas; 25th Infantry Division G4, Schofield Barracks Hawaii; 17th Corps Support Battalion, Schofield Barracks, Hawaii; 23rd Support Brigade, Camp Humphreys, Korea; 19th Theater Support Command; Camp Henry, Korea; UNC,CFC, USFK, EUSA, Seoul Korea; US Army G4, Pentagon, Washington DC.
His military education includes: Primary Leadership Development Course (PLDC); Advanced Noncommissioned Officer Course; Food Service Management Course; Instructor Course (Distinguished Graduate) Contractors Course (Distinguished Graduate); First Sergeant Course; Battle Staff Course, the U.S. Army Sergeants Major Academy; Class 48 and the Command Sergeants Major Course.
CSM Welch also attended Central Texas College where he obtained his Associates degree in general administration. Accomplishments include the first Food Service CSM to serve at a 4 Star Level Command and the first Army G-4 CSM. CSM Welch a Distinguished Member of the Quartermaster Corps, and an honorary inductee into the Audie Murphy Club.
His awards and decorations include the Distinguished Service Medal, Defense Superior Service Medal, Legion of Merit, Meritorious Service Medal (3rd award), Army Commendation Medal (6th Award), Army Achievement Medal (5th Award), Defense Service Medal (2nd Award), Global War on Terrorism Service Medal, and the Korea Defense Service Medal.