SgtMaj Mack enlisted in the United States Marine Corps in 1986 and attended recruit training at 3rd Recruit Training Battalion Parris Island, SC. He graduated from recruit training and was meritoriously promoted to the rank of PFC in September 1986. He then reported to Basic School at Camp Johnson in Camp Lejeune, NC and upon completion of the Basic Course he reported to MCAS Yuma, AZ for duty as a Finance Clerk. In August 1987, LCpl Mack was transferred to Casualty Co, Marine Corps Recruit Depot, San Diego, CA then on to HqCo, H&S Bn MCRD, San Diego, CA in November 1987. In November 1989, he was promoted to the rank of Cpl and was an honor graduate from Combat Enhancement Training. Cpl Mack was then transferred to Quantico, VA in December 1989 to be an auditor in the Finance Office, Separations Section. Cpl Mack also deployed to 3rd FSSG Okinawa, Japan to support Operation Cobra Gold. In May 1993, he was promoted to the rank of Sgt and tasked with training and creating the Standard Operating Procedures for the Finance Office for the Separation of Marines in Okinawa, Japan. In January 1994, Sgt Mack reported to MCB Kaneohe Bay, HI and was selected as NCO of the Quarter, assigned as the Battalion Career Planner and appointed as the Color Sergeant. In April 1997, he was promoted to SSgt and reported to HqCo, H&S Bn Marine Corps Recruit Depot, San Diego, CA for duty as the Pay SNCOIC of the Finance Office. In June of 1999, SSgt Mack reported to Drill Instructor School where upon completion, he was assigned to Bravo Co 1st Recruit Training Battalion MCRD, San Diego, CA. SSgt Mack held the billet of Drill Instructor, Senior Drill Instructor, Chief Drill Instructor, Operations Chief, and Operations Officer. He was selected by his peers to be the recipient of the Dan Daly Leadership Award, GySgt Nichols Award (Best New Drill Instructor), Drill Instructor of the Quarter, and 3 Honor Platoons, a Company Honorman and Series Honorman.
In August 2001, SSgt Mack was promoted to the rank of GySgt and was re-assigned to Marine Forces Atlantic. In August 2002, GySgt Mack was interviewed as a Manpower Analyst representing the Marine Corps at Manpower and Reserve Affairs (M&RA), Office of the Secretary of Defense (OSD). In August 2003, GySgt Mack was transferred to the position of Marine Analyst for the Marine Corps at Marine Information Systems at M&RA Division. In May 2004, GySgt Mack was transferred to Officer Candidate School where he served as a Platoon Sergeant and received the Best Drill Instructor of the Cycle Award. During August 2004, GySgt Mack attended the Advanced Course, Quantico VA where he distinguished himself through the course and was chosen by his peers as the recipient of the class Gung Ho Award for the student who best personified the traits and principles of Leadership of a Staff Non-Commissioned Officer. In December of 2004, SgtMaj Mack was selected to rank of 1stSgt and was frocked on February 2nd 2005where assumed duties as Company 1stSgt Marine Corps Institute Marine Barracks, 8TH & I, Washington, DC on the 3rd day of February 2005. In October 2008, SgtMaj Mack was selected to the rank of SgtMaj and received PCAOs to proceed to MWSS-373 in April 2009. May 2011, SgtMaj Mack reported for duty at Recruiting Station Orange, 12th Marine Corps District as the Recruiting Station Sergeant Major. May 2013, SgtMaj Mack reported for duty as the SgtMaj of the Wounded Warrior Regiment.
SgtMaj Mack’s personal awards include; Meritorious Service Medal in lieu of second award, Navy and Marine Corps Commendation Medal in lieu of fifth award, Navy and Marine Corps Achievement Medal in lieu of second award, Marine Corps Good Conduct Medal in lieu of eighth award, National Defense Medal in lieu of second award, Sea Service Deployment Ribbon in lieu of third award, Iraqi Campaign, Afghanistan Campaign, NATO ISAF Afghanistan, and the Drill Instructor ribbon.
SgtMaj Mack is married to the former Charlene B. Johnson of King George, VA.