Sergeant Major Jason E. Sepeda enlisted in the Marine Corps in March 1996 and attended recruit training at Marine Corps Recruit Depot, Parris Island, SC from May 1996 to August 1996. Upon graduation from recruit training, he attended the M1A1 Tank Crewman Course at Ft. Knox, KY and then completed Marine Combat Training at Camp Geiger, NC.
In January 1997, Private First Class Sepeda reported to Charlie Company, 8th Tank Battalion (TKBN). He served as a tank crewman working his way from a driver, to loader and then to a tank gunner. In 2001, while serving with Charlie Company, Corporal Sepeda represented 8th TKBN at the annual Marine Corps Tank Gunnery competition known as “Tiger Comp”. He was promoted to Sergeant in April 2001.
In April 2001, Sergeant Sepeda transferred to Bulk Fuel Platoon, 6th Motor Transport Battalion, Texarkana, TX. There he cross trained and became a Motor Vehicle Operator after completing schooling at Ft. Dix, NJ. He served as a Squad Leader and Training Chief until being activated in support of Operation Enduring Freedom in January 2003.
In January 2003, Sergeant Sepeda reported to 1st Transportation Battalion, 1st Force Service Support Group (FSSG), Camp Pendleton, CA. He deployed to Iraq where he served as a Security Team Leader with Convoy Control. Nearing completion of the deployment, he volunteered to stay behind and join the Special Marine Air Ground Task Force assisting with the retrograde of Marine Corps assets back to the states.
In January 2004, Sergeant Sepeda’s mobilization was extended and he reported to the Reserve Support Unit aboard Camp Pendleton, CA. He served with the G-4 as the Motor Transportation Chief and Embark rep to assist with the retrograde of equipment back to the various reserve units. He deployed again to Iraq from August 1994 to March 1995 with the G-4. During this deployment he served as the Field Ordering Officer and Camp Maintenance Chief. In June 2005, he was demobilized and transferred to 4th FSSG West, Camp Pendleton, CA where he served as the Logistics Chief.
In November of 2005, Sergeant Sepeda was activated in support of Operation Iraqi Freedom and reported to the G-4, 1st FSSG. He served as a Logistics Readiness Evaluation (LRE) Inspector until deploying to Iraq again in February 2006. During this 12 month deployment, he served as the Base Motor Transportation Chief and Base Operations Platoon Sergeant. He was promoted to Staff Sergeant in June 2006. Upon return to Camp Pendleton, Staff Sergeant Sepeda was once again demobilized in June 2007.
In September 2007, Staff Sergeant Sepeda transferred to Alpha Company, 6th Motor Transport Battalion, Orlando, FL. There he served as a Platoon Commander for a short three months.
In November of 2007, Staff Sergeant Sepeda was activated and transferred to Casualty Affairs, Headquarters Marine Corps, Quantico, VA. There he served as a Casualty Liaison Officer and was part of the team that created and implemented the new Casualty Call Center. After a one-year tour, he was demobilized in November 2008 and returned to Florida.
In December of 2008, Staff Sergeant Sepeda was activated and transferred to the Tampa Veterans Hospital, where he would serve as a Marine Liaison Officer and Staff Non-Commissioned Officer In Charge of Tampa Detachment, Wounded Warrior Battalion East. There he was promoted to Gunnery Sergeant in 2009.
In September 2012, Gunnery Sergeant Sepeda was demobilized and transferred to Headquarters and Service Company, 4th Assault Amphibious Battalion, Tampa, FL. He served as Company Gunnery Sergeant and Logistics Chief. He was promoted to First Sergeant in May of 2014.
In June 2014, 1stSgt Sepeda transferred to Alpha Company, 6th Communications Battalion, where he served as Company First Sergeant until December 2015.
In January 2016, 1stSgt Sepeda was activated and transferred to Headquarters Company, Marine Forces Europe and Africa where he served as Company First Sergeant until January 2018.
In May 2018, 1stSgt Sepeda transferred to Fox Battery, 2nd Battalion, 14th Marine Regiment where he served as the Battery First Sergeant. While with Fox Battery, 1stSgt Sepeda participated in OCONUS exercise Dynamic Front in Latvia. He was promoted to Sergeant Major in April 2019.
Sergeant Major Sepeda assumed his current post at Marine Tactical Air Command Squadron 48 in May 2019 and currently serves as Squadron Sergeant Major.
His personal awards include the Navy Marine Corps Commendation Medal with gold star, Navy Marine Corps Achievement Medal, Marine Corps Good Conduct Medal with bronze star, Selected Marine Corps Reserve Medal with three bronze stars, and the Military Outstanding Volunteer Service Medal.