First Sergeant Grinter enlisted in the Marine Corps in Tulsa, Oklahoma. He graduated Recruit Training on December 17, 1993 as a Private First Class. After completing Recruit Training, he reported to Infantry Training Battalion, School of Infantry, Camp Pendleton California.
PFC Grinter completed infantry training and was later assigned further training at the Light Armored Vehicle Company, as an LAV Crewman. Upon completion of training PFC Grinter was given orders and reported to 3rd Light Armored Reconnaissance Battalion, Twentynine Palms California on March 15, 1994.
While serving with 3D LAR BN LCpl Grinter held the billet of Gunner on an LAV-25. From May to November 1995 Cpl Grinter participated in a Unit Deployment Program deployment to Okinawa Japan. Upon completion of the deployment Cpl Grinter was assigned as a Vehicle Commander on an LAV-25. Cpl Grinter attended both the LAV Vehicle Commander’s course and Corporal’s Course in 1996. From November 1996 to April 1997 Cpl Grinter worked as an Entry Level Pistol Coach and Pistol Range NCOIC at the Twentynine Palms Pistol Range.
Sgt Grinter was then transferred to 1st BN 5th MAR as a section leader for the LAR Plt for deployment with 31st MEU from May to November 1997. During the deployment the MEU participated in Exercise Cobra Gold in Thailand. Upon return from deployment Sgt Grinter transferred to the Individual Ready Reserve.
Sgt Grinter then joined Weapons Company 1st BN 23D MAR in Austin Texas. Sgt Grinter was then transferred to Detachment A Company B for mobilization and deployment in support of Operation Enduring Freedom. The Detachment completed the Marine Corps Security Forces School in Chesapeake VA, and were deployed to assume the security mission at US Naval Base Guantanamo Bay, Cuba from Jan to Dec 2002. Upon completion of the deployment as a Platoon Sergeant, Sgt Grinter stayed with Bravo Company 1st BN 23 MAR.
Sgt Grinter was mobilized and deployed in support of Operation Iraqi Freedom II from May 2004 to April 2005 with 1st BN 23d MAR. The Battalion was assigned as part of Regimental Combat Team 7 in Al Anbar Province Iraq. Company B was later attached to 3rd Light Armored Reconnaissance Battalion for combat operations in Fallujah and Ramadi. In March of 2005 he was promoted to the rank of Staff Sergeant. Upon completion of the deployment SSgt Grinter held the billet of Platoon Commander and Company Gunnery Sergeant.
GySgt Grinter transferred to Headquarters Company, Headquarters Battalion,4th Marine Division in August of 2010. GySgt Grinter was assigned as the Training Chief and Company Gunnery Sergeant. GySgt Grinter also worked as the Logistics Chief during Exercise Javelin Thrust 2011 at the Mountain Warfare Training Center, Bridgeport CA. GySgt Grinter attended the Advanced Staff NCO Academy at Quantico, VA in 2012.
First Sergeant Grinter was promoted and reported to India Company 3rd BN 23D MAR, Little Rock AR in June 2013. In June, 2014 India Co was selected to represent 4th Marine Division in Exercise Western Accord in Senegal, Africa. In May 2016 First Sergeant Grinter was transferred to Headquarters Battery, 2nd BN 14th MAR.
1stSgt Grinter’s personal decorations include: Navy and Marine Corps Commendation Medal with Combat Distinguishing Device, Navy and Marine Corps Achievement Medal, and the Combat Action Ribbon.