Sergeant Major Doring served three years in the United States Army Reserve and enlisted in the Marine Corps on 4 March 1991, attended Recruit Training at MCRD San Diego, CA., where he graduated as a PFC.  He completed Marine Combat Training at Camp Pendleton, CA, and was meritoriously promoted to Lance Corporal. He then reported to Lackland Air Force Base, TX for Military Police School to complete and receive the 5811 Military Police MOS.  From September 1991 to May 1994, Lance Corporal Doring was stationed wit MWSS-371, MCAS Yuma, AZ. and served as a Patrolman, Squad Leader, and Field Military Policemen, which included a deployment to Mogadishu, Somalia in support of Operation Restore Hope. In June 1992, he was meritoriously promoted to Corporal.
 
In February 1994, Corporal Doring received orders to MP Company, HQ Battalion, 3rd Marine Division, Okinawa, Japan. He was promoted to Sergeant and served as a Watch Commander for the Provost Marshal Office and Squad Leader for MP Company. In March 1995, he received orders to MP Company MCB, Camp Pendleton. There he served as a Patrol Supervisor for Law Enforcement Operations and Field Training Officer for 1st Platoon and was selected as the Non-Commissioned Officer of the Year for Security Battalion in 1996. 
 
In January 1997, Sergeant Doring received orders to Drill Instructor School, MCRD San Diego, and was assigned to Co E.  He served as a Drill Instructor as well as Senior Drill Instructor and was promoted to Staff Sergeant. In February 1999, he reported to Special Training Company and served as a DI, SDI, and Chief Drill Instructor. In May 2000, he reported to Marine Corps Base, Camp Kinser Okinawa, Japan and served as Platoon Sergeant for Military Police Department-South and SNCOIC of the night watch.    
 
In May 2001, Staff Sergeant Doring received orders to MP Co. MCB, Camp Pendleton, CA., where he served as a Watch SNCOIC, Watch Commander, and Company Gunnery Sergeant. In May 2002, He graduated from the University of Maryland with a Bachelors of Science Degree in Criminal Justice and was promoted to Gunnery Sergeant in Oct 2003. In February 2004; he received orders to MP Company, HQ Battalion, 1st FSSG, and was deployed to the Al Anbar province in support of Operation Iraqi Freedom 1-04 where he served as the Company First Sergeant. He completed one more deployment to Al Anbar Province, Iraq in September 2005, and was selected to First Sergeant in December 2005.
 
 In July 2006, First Sergeant Doring was assigned to Inspector Instructor Duty with Bravo Co, Anti-Terrorism Bn, 4th Marine Division in Amarillo, TX.  In April 2009, he received orders to MCRD, San Diego and served as the Co. G First Sergeant. He completed his Masters of Arts Degree in Homeland Security in 2010 and received orders to 1st Intelligence Battalion, Camp Pendleton. He held several billets to include acting SgtMaj, HQ Co 1stSgt, and deployed to the Helmand Province, Afghanistan as the Counter-Intelligence Co. and HQ Co. 1stSgt. He was promoted to Sergeant Major in December 2012 and was assigned as the Combat Logistics Battalion 15 Sergeant Major, where he deployed in support of WESPAC 12-1. Then he was assigned to the Recruiter Station Los Angeles as SgtMaj, and is now assigned as the MCIPAC MCCB Camps Foster and Lester/H&S Bn SgtMaj here in Okinawa, Japan.
 
Sergeant Major Doring’s personal decorations include the Meritorious Service Medal with 1 Gold Star, Navy Commendation Medal with 1 Gold Star, Navy Achievement Medal with 3 Gold Stars, the Army Achievement Medal, and the Combat Action Ribbon with 1 Gold Star.