Col Grosz was born in Quantico, VA, and graduated from the University of South Carolina in May 1993 with a Bachelor of Science in Business Administration – Finance and commissioned under the Naval Reserve Officer Training Corps.
He was assigned to 2d Battalion, 7th Marines from May 1994 – July 1997 as a Rifle Platoon Commander, Weapons Platoon Commander, Weapons Company Executive Officer and Weapons Company Commander. During this time, he deployed twice to Okinawa as part of the Unit Deployment Program and to Panama as part of the Marine Security Detachment. From July 1997 – June 2000, he was assigned to Marine Corps Recruit Depot, San Diego as a Series Officer, Recruit Training Company Commander, and Assistant G-2/3 Training Officer. In 2000, he received a Master of Business Administration in Financial Management from National University. He attended and completed the Marine Corps Command and Control Systems Course, Quantico, VA from August 2000 – June 2001.
Upon completion of school, Col Grosz was assigned to 3d Battalion, 7th Marines from July 2001 – September 2003 as India Company Commander. During January 2003, he deployed India Company to Kuwait in support of Operation Iraqi Freedom and participated in combat operations in Iraq from March to September 2003.
Assigned as the Inspector-Instructor for Company G, 2d Battalion 23d Marines in Los Alamitos, CA from September 2003 – June 2006, he planned, developed, and executed training exercises in Denmark, Poland, and Japan. Col Grosz attended and completed the Marine Corps Command and Staff College, Quantico, VA from August 2006 – June 2007 receiving a Master of Science in Military Studies.
Following school, Col Grosz was assigned to the Joint Forces Staff College in Norfolk, VA from July 2007 – June 2009. There he served as an Information Operations Instructor at the Joint Command, Control and Information Operations School and received Master Faculty designation at the completion of his assignment. He completed Joint Professional Military Education Phase II and is Joint Qualified.
Col Grosz served as the Inspector-Instructor, 4th Light Armored Reconnaissance Battalion, Camp Pendleton, CA, from July 2009 – June 2011. During this time, he successfully mobilized, deployed, and deactivated half the battalion in support of operations in Afghanistan while reconstituting the rest of the battalion following deployments in support of Operation Iraqi Freedom and prepared the battalion for multiple training exercises in Morocco, South Africa, and the United States.
Following his command tour, Col Grosz attended the National War College and received a Master of Science in National Security Strategy upon completion in June 2012. In July 2012, he was assigned as the Branch Head, Information Integration at the Small Wars Center & Irregular Warfare Integration Division, Capabilities Development Directorate in Quantico, VA. From November 2012 – November 2013, Col Grosz deployed to Monrovia, Liberia as the Deputy Chief of Operations, Plans Section for the Military Component of the United Nations Mission in Liberia. From February 2014 – July 2016, Col Grosz served as Director, Force Protection Integration Division and Capability Portfolio Manager, Capabilities Development Directorate in Quantico, VA.
In July 2016, Col Grosz reported for duty to Marine Corps Base Camp Lejeune, NC. From July 2016 – November 2016, he served as the Assistant Chief of Staff G-3 Operations for Second Marine Division. In December 2016, Col Grosz reported for duty with Task Force Southwest, serving as the Officer in Charge of the Army Advisor Team and Senior Advisor to the 215 Corps of the Afghanistan National Army. He deployed to Afghanistan from April 2017 – January 2018 in support of Operation Freedom’s Sentinel as part of the first rotational Marine unit back in Helmand Province. From March 2018 – July 2019, Col Grosz served as the II Marine Expeditionary Force G-3 Current Operations Officer. During this time, he was the Officer in Charge of the Destructive Weather Center during Hurricane Florence and the Assistant Chief of Staff G-3 Operations during Exercise Trident Juncture 2018 in Norway, the largest NATO exercise and deployment of Marine Forces to Europe since the end of the Cold War.
His decorations include: Legion of Merit, Bronze Star Medal, Defense Meritorious Service Medal with one oak leaf cluster, Meritorious Service Medal, Navy and Marine Corps Commendation Medal with Combat “V” and two gold stars, Navy and Marine Corps Achievement Medal and Combat Action Ribbon.