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 meritoriously and was promoted to the rank of PFC in September 1986. He then reported to Basic School at Camp Johnson in Camp Lejeune, NC. Upon completion of the Basic Course in November 1986, PFC Mack reported to MCAS Yuma, AZ for duty as a Finance Clerk.
In January 1987, PFC Mack was selected as Marine of the Month and later Marine of the Quarter. He was promoted to the rank of LCpl in March 1987. In August 1987, LCpl Mack was transferred to Casualty Co, Marine Corps Recruit Depot, San Diego, CA for duty at Marine Liaison. LCpl Mack was then transferred to HqCo, H&S Bn MCRD, San Diego, CA in November 1987.
In November 1989, SgtMaj Mack was promoted to the rank of Cpl and was an honor graduate from Combat Enhancement Training. Cpl Mack was transferred to Quantico, VA in December 1989. After duty as an auditor of the Finance Office Separation Section, Cpl Mack was ordered to deploy to 3rd FSSG Okinawa, JPN. In December 1992, Cpl Mack reported to 3rd FSSG Okinawa, JPN and supported Operation Cobra Gold. In May 1993, SgtMaj Mack 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, JPN.
Sgt Mack reported to MCB Kaneohe Bay, HI for duty as an Auditor in January 1994. He was selected as NCO of the Quarter and then appointed as the Battalion Career Planner. In August of that same year, he participated in the Career Planning Course at Quantico, VA. Sgt Mack returned to Kaneohe Bay, HI as the Hq&Svc Bn Career Planner and was screened and selected as the Kaneohe Bay Marine Corps Base Hawaii Color Sergeant.
In April 1997, SgtMaj Mack was promoted to the rank of 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. SSgt Mack was transferred to Recruit Training Regiment for Drill Instructor School in June 1999. Upon completion of Drill Instructor School, SSgt Mack was assigned to Bravo Co 1st Recruit Training Battalion MCRD, San Diego, CA. While at 1st Bn, SSgt Mack held the billet of Drill Instructor, Senior Drill Instructor, Chief Drill Instructor, Operations Chief, and Operations Officer. During this period, SSgt Mack 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, SgtMaj Mack was promoted to the rank of GySgt. GySgt Mack was re-assigned to Marine Forces Atlantic for duty as the Finance Office Pay SNCOIC in August 2002. After receiving two inspections from the MCAAT Audit Team, 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 was recognized by his peers and received the Best Drill Instructor of the Cycle Award.
During August 2004, GySgt Mack participated in the Advanced Course Class 5-04 at the Staff Non-Commissioned Officers Academy, Quantico VA. 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.
Upon graduation from the Advanced Course, GySgt Mack returned to MI, M&RA. In December of 2004, SgtMaj Mack was selected to rank of 1stSgt. On the 2nd day of February 2005, SgtMaj Mack was frocked to the rank of 1stSgt. 1stSgt Mack assumed duties as Company 1stSgt Marine Corps Institute Marine Barracks, 8TH & I, Washington, DC on the 3rd day of February 2005.
September 2006, SgtMaj Mack received PCSOs to 1st Combat Engineer Bn, 1st Marine Division as the Co 1stSgt, for Company B, 1st CEB. After returning from deployment with Company B, 1st CEB, SgtMaj Mack was re-assigned in January 2008 to H&S Co 1st CEB. In June 2008, SgtMaj Mack was selected to represent the Ground Combat Element I MEF at the 2009 SSgt Promotion Board at Promotions Branch Quantico, VA. 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.
SgtMaj Mack’s personal awards include; Meritorious Service Medal, 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.