Sergeant Major Dorsey was born in Clinton, Iowa. He enlisted in the Marine Corps in 1998 and attended recruit training at 3d Recruit Training Battalion, Marine Corps Recruit Depot, San Diego, California. Dorsey reported to the Basic Motor Transport Mechanics Course at Camp Johnson, North Carolina earning the MOS of 3521. Dorsey was promoted to Private First Class before reporting for duty with 3rd Material Readiness Battalion, Motor Transport Maintenance Company, Camp Kinser, Okinawa, Japan where he deployed to Korea while attached to the Alert Contingency Marine Air Ground Task Force. Dorsey was promoted to the rank of Lance Corporal and was selected to attend the Advanced Motor Transport Mechanics Course back aboard Camp Johnson, North Carolina where he was then promoted to the rank of Corporal and attaining the MOS of 3522. Dorsey then returned to Okinawa to finish his second year.
In October 2000, Corporal Dorsey reported to 3d Marine Aircraft Wing, Marine Tactical Air Command Squadron 38 where he was promoted to Sergeant and served as the Maintenance Chief, Platoon Sergeant, and Squadron Color Sergeant. In 2003 Sergeant Dorsey deployed in Support of Operation Enduring Freedom and Operation Iraqi Freedom.
In January 2004 Sergeant Dorsey reported to Drill Instructor School as a student. In March Dorsey reported to Kilo Company, 3d Recruit Training Battalion, San Diego, California for duty as a Drill instructor. Dorsey completed 8 cycles as a Drill Instructor, and Senior Drill Instructor. In 2005 Dorsey was promoted to Staff Sergeant and completed his tour aboard the Recruit Depot as a Marine Corps Instructor of Water Survival.
In March of 2007 Staff Sergeant Dorsey reported to 1st Maintenance Battalion, Repairable Management Company, Camp Pendleton, California. He served as the Engines and Transmission rebuild floor chief. Shortly after reporting to the command Dorsey attended the Motor Transport Chiefs Course. In 2008 Dorsey deployed back to Iraq in Support of Operation Iraqi Freedom where he served as the Motor Transport Chief and Dynamometer Chief for all maintenance assets within the company.
In April 2010 Staff Sergeant Dorsey reported to 4th Maintenance Battalion, General Support Maintenance Company, Rock Island, Illinois as part of the Inspector-Instructor Staff. In September he was then promoted to Gunnery Sergeant. Dorsey served as the Organics Maintenance Chief, Equal Opportunity Representative, Arms Ammunition and Explosives Officer, Anti-Terrorism Officer, Toys for Tots Coordinator, and the Motor Transport Licensing Examiner. Dorsey was then selected to serve as the Company 1stSgt to complete his tour aboard the Rock Island Arsenal within General Support Maintenance Company.
In August 2013 GySgt Dorsey transferred to Logistics Operational School, Marine Corps Combat Service Support Schools where he served as an instructor for the Advanced Ground Transportation Operational Support Section. In February 2014 Dorsey was frocked to the rank of 1st Sergeant and transferred to 3d Battalion, 2d Marines, 2d Marine Division, Camp Lejeune, North Carolina. During his time there, Dorsey served as 1stSgt for Company K where he deployed in support of Unit Deployment Program 2-15 to Korea, the Philippines, and Okinawa, Japan. Post that deployment he was moved over to serve as Weapons Company 1stSgt where he deployed again with the Battalion in support of Unit Deployment Program 2-16 back to Okinawa, Japan.
In July 2017 1stSgt Dorsey transferred to Headquarters Regiment, 1st Marine Logistics Group Camp Pendleton, California where he served as company 1stSgt for Headquarters Company. During his time there he also fulfilled the duties as the Battalion SgtMaj for Combat Logistics Battalion 11. On February 23rd Dorsey was promoted to his current rank of Sgt Maj before executing orders to his current position at 1st Battalion 5th Marines, 1st Marine Division Camp Pendleton, California.
Dorsey’s personal awards include the Navy Commendation Medal with 2 gold stars in lieu of third award, and the Navy and Marine Corps Achievement Medal with 3 gold stars in lieu of fourth award.