Sergeant Major Coffey was born on July 26, 1982, in Harrisburg, Pennsylvania. He enlisted in the Marine Corps on November 27, 2000, and attended recruit training at the Marine Corps Recruit Depot, Parris Island, South Carolina and graduated from 2nd Recruit Training Battalion Hotel Company in February 2001. Sergeant Major Coffey attended Marine Combat Training at SOI East Camp Geiger, North Carolina. Sergeant Major Coffey reported to military occupational school in July 2001 to NAS Pensacola Florida to become a F/A-18 Safety Equipment Mechanic. Sergeant Major Coffey was promoted to Private First Class in August 2001 and shortly graduated in September 2001. Upon graduation Sergeant Major Coffey reported to MOS C School NAS Lemoore California. Upon completion of school Sergeant Major Coffey was Meritoriously Promoted to Lance Corporal.
In July 2001 Sergeant Major Coffey reported to Marine Fighter Attack Squadron 312 Marine Corps Air Station Beaufort South Carolina and a year later transferred to Marine Fighter Attack Squadron 115 for duty as F/A-18 Ejection Seat Mechanic. In December 2002 Sergeant Major Coffey deployed aboard the USS Harry S. Truman in support of Operation IRAQ FREEADOM. In March 2004 Sergeant Major Coffey deployed again aboard USS Harry S. Truman in support of Operation IRAQ FREEADOM 2. January 2006 he was promoted to the rank of Sergeant and deployed to Iwakuni, Japan as part of the Western Pacific Unit Deployment Program.
In July 2007 Sergeant Major Coffey received orders to Marine Aviation Training Support Group 21 Naval Air Station Pensacola Florida to serve as MOS school Instructor, Instructor Evaluator, and Curriculum Course Developer. In February 2009 Sergeant Major Coffey was promoted to the rank of Staff Sergeant.
In March 2010 Sergeant Major Coffey reported to Marine Fighter Attack Squadron 323 Marine Corps Air Station Miramar California to serve as Seat Shop Staff Non-Commissioned Officer in Charge. January 2011 Sergeant Major Coffey deployed aboard the USS Ronald Regan in support of Operation TOMODACHI, and Operation ENDURING FREEDOM.
In January 2012, Sergeant Major Coffey received orders to Drill Instructor School class 2-12, Marine Corps Recruit Depot, San Diego, California. Upon graduation, he was transferred to 3rd Recruit Training Battalion, Lima Company. Sergeant Major Coffey served as Drill Instructor, Senior Drill Instructor, Chief Drill Instructor, and 3rd Battalion Operations Chief. In December 2013 Sergeant Major Coffey was promoted to the rank of Gunnery Sergeant.
In March of 2015 Sergeant Major Coffey received orders to Marine Fighter Attack Squadron 122 Marine Corps Air Station Beaufort South Carolina to serve as Airframes Division Chief. June 2015 Sergeant Major Coffey deployed with Marine Fighter Attack Squadron 251 onboard the USS Theodore Roosevelt in support of Operation INHERENT RESOLVE. In March 2015 he deployed to Iwakuni, Japan as part of the Western Pacific Unit Deployment Program.
In March 2017 Sergeant Major Coffey was promoted to the rank of First Sergeant and received orders to 1st Battalion 6th Marines as Company C Company First Sergeant. In September 2017 Sergeant Major Coffey deployed as part of Task Force 9.7 to Syria in support of Operation INHERENT RESOLVE. In January 2019 Sergeant Major Coffey assumed the duty of Company First Sergeant for Headquarters and Service Company.
In July 2019 Sergeant Major Coffey received orders to Combat Logistics Battalion 4 where he served as the Headquarters and Service and Motor Transportation Company First Sergeant. In December 2020 he received orders to Combat Logistics Regiment 37, Headquarters Company.
In March 2022 Sergeant Major Coffey was selected for promotion to his current rank and in April of 2022 he reported to Recruiting Station Oklahoma City, 9th Marine Corps Recruiting District where he currently serves as the Recruiting Station Sergeant Major.
Sergeant Major Coffey's personal awards include the Navy and Marine Corps Commendation Medal with 1 gold star and the Navy and Marine Corps Achievement Medal with 3 gold stars, and Good Conduct Medal with 1 Silver Star