First Sergeant Matthew D. Tomaszewski is a native of Colorado Springs, Colorado. He enlisted in the Marine Corps in July 2006, and attended recruit training with Lima Company, 3rd Recruit Training Battalion, Marine Corps Recruit Depot Parris Island, where he was meritoriously promoted to the rank of Private First Class. After graduating recruit training in October 2006, Private First Class Tomaszewski attended Marine Combat Training at Camp Geiger, North Carolina. Upon completion, he reported to Fort Sill Oklahoma where he attended the Field Artillery Cannon Crewman's Course and obtained the Military Occupational Specialty of 0811, Field Artillery Cannoneer.
In February 2007, Private First Class Tomaszewski reported to Battery “S”, 5th Battalion, 10th Marine Regiment where he served as a Cannon Crewman and was promoted to the rank of Lance Corporal. In September 2007, while serving as the number one cannoneer for howitzer section 6 Lance Corporal Tomaszewski participated in a Unit Deployment to Iraq in support of Operation Iraqi Freedom where he was meritoriously promoted to the rank of Corporal in March 2008. In November 2009, Corporal Tomaszewski reported to Battery “C”, 1st Battalion, 10th Marine Regiment and was promoted to the rank of Sergeant January 2010. In November 2010 Sergeant Tomaszewski participated in a Unit Deployment to Afghanistan as First Platoon's Local Security Chief in support of Operation Enduring Freedom.
In September 2012, Sergeant Tomaszewski received orders to Camp Pendleton California where he reported to Battery “T” 5th Battalion, 11th Marine Regiment. In January 2014 while serving as a High Mobility Artillery Rockets System Section Chief, Sergeant Tomaszewski participated in a Unit Deployment to Afghanistan in support of Operation Enduring Freedom. He was promoted to Staff Sergeant in October 2015. November 2015 Staff Sergeant Tomaszewski was assigned to Battery “R” 5th Battalion, 11th Marine Regiment. In May 2016, serving as the 2nd Platoon Sergeant, Staff Sergeant Tomaszewski participated in a Unit Deployment Program to Okinawa Japan as part of the inaugural HIMARS Battery to be deployed in the Pacific theater. Upon return, Staff Sergeant Tomaszewski assumed the billet of Battery Gunnery Sergeant for Battery “R”.
In July 2017, Staff Sergeant Tomaszewski reported to Drill Instructor School, Marine Corps Recruit Depot Parris Island and upon graduation was assigned to Lima Company, 3rd Recruit Training Battalion. He completed 6 training cycles and served the billets of Drill Instructor, Senior Drill Instructor and Chief Drill Instructor. In November 2019 he was promoted to the rank of Gunnery Sergeant.
In October 2020, Gunnery Sergeant Tomaszewski reported to Battery "K" 2nd Battalion, 10th Marine Regiment where he held the billets of Battery Gunnery Sergeant and Battery First Sergeant. In May 2022 Battery "K" was re-designated to Battery "H". In March 2023 Gunnery Sergeant Tomaszewski deployed to Andoya Airbase, Norway in support of Marine Rotational Forces Europe 23.2-1. In October 2023 while serving as the Battery Gunnery Sergeant, Gunnery Sergeant Tomaszewski participated in a Unit Deployment Program to Okinawa Japan. In June 2024 Gunnery Sergeant Tomaszewski was promoted to his current rank of First Sergeant and began serving as the Battery First Sergeant for Battery "S".
In August 2024, First Sergeant Tomaszewski reported to Site Support Greensboro, 4th Combat Readiness Regiment, 4th Marine Logistics Group, Greensboro North Carolina. First Sergeant is currently serving as the Unit Senior Enlisted Leader for the Instructor Inspector, Communications Company, 4th CRR.
First Sergeant Tomaszewski's personal awards include the Navy and Marine Corps Commendation Medal with one gold star, Navy and Marine Corps Achievement Medal with two gold stars, and Marine Corps Drill Instructor Ribbon.