SgtMaj Cordero enlisted in the Marine Corps November of 1997 and attended recruit training at Marine Corps Recruit Depot, Parris Island, SC graduating April 1998. Subsequently in June 1998, he reported to Assault Amphibious School for Assault Amphibian Crewman Course, Camp Pendleton, CA where he received the Military Occupational Specialty of 1833, Amphibian Crewman.
In September 1998, he reported to 3d Assault Amphibious Battalion (AABn), Camp Pendleton, CA. In September 1999, SgtMaj Cordero was meritoriously promoted to the rank of Corporal. In January 2000, Cpl Cordero deployed to Okinawa, Japan with Alpha Company (Co) as part of the Unit Deployment Program (UDP).
In July 2000, SgtMaj Cordero received orders to 3d Platoon, Delta Company, 3d AABN, 29 Palms, CA. He deployed with Charlie Co in January 2001 as part of the UDP, where he participated in Land Force Cooperation Afloat Readiness and Training.
In October 2001, SgtMaj Cordero received orders to Recruiters School, MCRD San Diego, CA. In January 2002, he reported to Recruiting Substation Manhattan, Recruiting Station NY, 1st Marine Corps District, where he served as a Canvassing Recruiter. In July 2004, he was meritoriously promoted to the rank of Staff Sergeant. Subsequently, he was the 2004 Recruiter of the Year award, 1st Marine Corps District.
In April 2005, SgtMaj Cordero reported to 3d Platoon, Bravo Co, 3d AABN, Camp Pendleton, CA, where he served as a Section Leader. In September 2005, SgtMaj Cordero deployed to Iraq in support of Operation Iraqi Freedom 5-7. In March 2007, SgtMaj Cordero redeployed with Bravo Company to OIF 7-02, assigned as Section Leader, 2nd Platoon.
In February 2008, SgtMaj Cordero reported to Assault Amphibian Schools Battalion to serve as an instructor. He served as the Co Gunnery Sergeant, Co First Sergeant, Platoon Commander, and Senior Instructor.
In April 2011, he reported to 2d Platoon, Charlie Co, 3d AABN, Camp Pendleton, CA where he served as a Platoon Sergeant. In October 2011, he deployed to Afghanistan in support of Operation Enduring Freedom 11-2.
In April 2013, SgtMaj Cordero received orders to Detachment 1, Transportation Services Company, Combat Logistics Battalion 25, Stone Bay, Camp Lejeune, NC and served as the Inspector-Instructor First Sergeant.
In December 2015 SgtMaj Cordero reported to 1st Combat Engineer Battalion, Camp Pendleton, CA where he served as Headquarters and Service Company First Sergeant.
In May 2017, SgtMaj Cordero reported to 3d Battalion, 12th Marine Regiment Okinawa, Japan and May 2018 assumed the duties as Battalion Sergeant, 3d Reconnaissance Battalion.
SgtMaj Cordero earned a Bachelor of Arts Degree with Honors in Organization Management from Ashford University in November 2015.
SgtMaj Cordero’s personal awards include the Meritorious Service Medal, Navy and Marine Commendation Medal with gold star in lieu of fourth award, Navy and Marine Corps Achievement Medal with gold star in lieu of second award, Marine Corps Good Conduct Medal with silver star in lieu of sixth award, and the Combat Action Ribbon.