Sergeant Major Hinzman enlisted the Marine Corps in 1988; he attended Recruit Training at Marine Corps Recruit Depot, Parris Island, South Carolina and graduated Private First Class.
Upon graduation he attended the School of Infantry, Camp Geiger, North Carolina. He then attended the Marine Corps Security Forces Training school in Norfolk, Virginia.
He was assigned as a Security Force Guard to Marine Corps Security Force Company, Royal Air Force Base Saint Mawgan, England, where he was promoted to Lance Corporal and subsequently Corporal. In October 1991
Corporal Hinzman was assigned to H&S Company, Headquarters Battalion, 2nd Marine Division, Camp Lejeune, North Carolina, where he served in the billets of Assignments Monitor and Troop Handler at Division Receiving. He was promoted to the rank of Sergeant.
In March 1992 Sergeant Hinzman was assigned to the Headquarters Battalion Rifle and Pistol Team during which time he competed in the Eastern Division Marine Corps Matches. He was discharged from active duty January 1993 and began service as a Law Enforcement officer in West Virginia.
He reenlisted November 1996 in the Selected Marine Corps Reserve and was assigned to Alpha Company, 4th Combat Engineer Battalion, 4th Marine Division, Charleston, West Virginia as a Squad leader.
In July 1997 he attended the reserve Combat Engineer MOS School located in Lynchburg, Virginia.
In 1998 he was promoted to Staff Sergeant and served in the billet of Platoon Sergeant until he was activated as an Individual Mobilization Augmentee in support of Operation Enduring Freedom. In 2004, he was assigned to the Coalition Military Assistance Training Team and was responsible for training, advising, and mentoring members of the Iraqi National Army in Kirkush, Iraq and Taji, Iraq.
Staff Sergeant Hinzman returned to Alpha Company, 4th Combat Engineer Battalion, 4th Marine Division, Charleston, West Virginia and served in the billet of Platoon Commander.
He was promoted to the rank of Gunnery Sergeant in September 2004. In 2007 he was assigned as the Administrative Chief to the Readiness Support Program 3 (RSP-3), Peacetime/Wartime Support Team (PWST), Marine Corps Mobilization Command, Kansas City, Missouri and served in that billet until 2008.
In 2008 he was promoted to First Sergeant and was assigned as the company First Sergeant to Kilo Company, 3rd Battalion, 25th Marine Regiment, 4th Marine Division, Moundsville, West Virginia.
He was activated in 2010 in support of Operation Enduring Freedom conducting security and augment operations for Regimental Combat Team 2 in Delaram, Afghanistan until his company was attached to 3rd Battalion 5th Marines conducting combat operations in Sangin, Afghanistan.
He continued to serve in that billet until being promoted to Sergeant Major in 2011. Sergeant Major Hinzman was assigned as the first Squadron Sergeant Major for Unmanned Aerial Vehicle Squadron 4 (VMU-4), Marine Air Control Group 48 (MACG-48), Camp Pendleton, California.
In 2014, Sergeant Major Hinzman was assigned to his current billet as Group Sergeant Major of Marine Aviation Group 49 (MAG-49), 4th Marine Air Wing, Joint Base McGuire-Dix-Lakehurst, New Jersey.
His personal decorations include: Meritorious Service Medal, Navy and Marine Corps Commendation Medal, and Navy and Marine Corps Achievement Medal (gold star in lieu of 3d award).