Sergeant Major Newcomb enlisted in the United States Marine Corps in July 1990. After completion of Recruit Training at Parris Island in October 1990, Sergeant Major Newcomb was transferred to Albany, GA. to attend the Supply Basic course where she received the MOS of 3051, Warehouse Clerk. She was also meritoriously promoted to the rank of Private First Class.
In December 1990, she was transferred to 3rd Supply Battalion, Okinawa, Japan where she worked as a warehouseman in the storage section. While assigned to 3rd Supply Battalion she was meritoriously promoted to the rank of Lance Corporal.
In January 1992, Sergeant Major Newcomb received orders to 2nd Supply Battalion, Camp Lejeune, North Carolina where she worked as the S-3 Administrative Chief, as well as, the Status of Resources and Training (SORTS) clerk, and the S-2 Security Chief. While assigned to 2nd Supply Battalion she attended the Corporal’s Leadership Course in 1995. Later, she also attended the Sergeant’s Course in 1998 while still attached to 2nd Supply Battalion. In July 1999, Sergeant Major Newcomb was transferred from the 2nd Supply Battalion S-3, to the 2nd Supply Battalion, Battalion Supply section where she worked as the Warehouse Chief, Supply Chief, and Supply Officer.
In July 2001, Sergeant Major Newcomb received orders to Drill Instructor School, MCRD Parris Island, South Carolina. Upon completion of Drill Instructor School, she attended the Marine Corps Martial Arts Instructor Course where she became a green belt MCMAP Instructor. While serving as a Drill Instructor, Sergeant Major Newcomb filled the billets of MCMAP Instructor, Drill Instructor, Senior Drill Instructor, and Series Chief Drill Instructor in November Company. She also served as a Drill Instructor, Senior Drill Instructor, and Company Gunnery Sergeant for Special Training Company.
In May 2005, Sergeant Major Newcomb executed orders to 8th Engineer Support Battalion, Camp Lejeune, North Carolina where she served as the Warehouse Chief. Sergeant Major Newcomb deployed with 8th Engineer Support Battalion, serving as the Supply Chief in support of Operation Iraqi Freedom IV (OIF). In 2007, Marines from 8th Engineer Support Battalion augmented 6th Engineer Support Battalion on deployment in support of OIF. Sergeant Major Newcomb deployed with 6th Engineer Support Battalion, as the Headquarters and Support Company First Sergeant, as well as the Supply Officer in support of Operation Iraqi Freedom VI (OIF). During her tenure at 8th Engineer Support Battalion, Sergeant Major Newcomb attended the SNCO Advance Course.
In March 2009, Sergeant Major Newcomb received orders to Headquarters and Support Battalion, Marine Corps Base, Camp Lejeune, North Carolina where she served as the Brig Company First Sergeant. While attached to Marine Corps Base, Sergeant Major Newcomb attended the E8 Seminar on New River Air Station; as well as the First Sergeant Course in Quantico, Virginia.
In May 2010, Sergeant Major Newcomb was ordered to Inspector-Instructor duty in Devens, Massachusetts, where she served as the Inspector-Instructor First Sergeant for Detachment, Ordnance Maintenance Company, 4th Maintenance Battalion. While stationed in Massachusetts, she attended the Senior Enlisted Professional Military Education (SEPME) in Quantico, Virginia.
In July 2013, received orders to the School of Infantry-East, Camp Geiger, North Carolina where she served as the Company F, First Sergeant, Marine Combat Training Battalion. In July 2014, she was moved to Company L, to serve as the Company First Sergeant. While at SOI, Sergeant Major Newcomb graduated from Expeditionary Warfare School, as well as, completing her Bachelor’s degree from Grand Canyon University.
In December 2014, Sergeant Major Newcomb received orders to Marine Heavy Helicopter Squadron 464 to serve as the Condors Squadron Sergeant Major.
In December 2016, Sergeant Major Newcomb received orders to Marine Aviation Logistics Squadron 29 where she is currently serving as the Squadron Sergeant Major.
Sergeant Major Newcomb’s personal awards include the Meritorious Service Medal with 1 Gold Star, the Navy and Marine Corps Commendation Medal with 1 Gold Star, and the Navy and Marine Corps Achievement Medal w/4 stars.