Sergeant Major Johnson is a native of Washington D.C., He enlisted in the U.S. Marines April 1999 upon graduating recruit training at Recruit Depot Parris Island, SC he reported to Infantry Training Battalion Camp Geiger, NC. He then went to Weapons Training Battalion where he was assigned the primary Military Occupation Skill (MOS) 0341 in Oct 1999.
In October of 1999, Private First Class Johnson reported to 3rd Bn 3rd Mar India Co Wpns Plt Kaneohe Bay, HI. He served as a Mortar Man and Section Leader. During this tour he participated in two UDPs and deployed with the 31st MEU in support of OIF.
In January 2004, Cpl Johnson executed orders to Marine Corps Security Forces where he received the MOS 8153 Cadre Trainer and later reported to 7th Fleet Yokosuka, Japan. While in Yokosuka, Japan he served as primary instructor of anti-terrorism level II and Auxiliary Security Force chief instructor
Sergeant Johnson departed Yokosuka, Japan in December 2005 where he reported to 1st Bn 8th Mar 81’s Plt as 1st Section leader and later was the Platoon Sergeant during the 24th MEU Commander’s Personal Security Detail during OIF . While on the MEU Sergeant Johnson was part of the Non-Combative Evacuation Operation in Beirut Lebanon in 2006 which resulted in a humanitarian relief and evacuation of Americans.
In May 2007 Sergeant Johnson reported to Recruiting School San Diego, CA. Upon graduating from Recruiting School, he obtained the 8411 MOS and assigned to 4th District Recruiting Station Frederick, MD. He served as canvassing recruiter and assistant Noncommissioned Officer in Charge (NCOIC).
In June of 2010 Staff Sergeant Johnson was reassigned to, 2nd Bn 3rd Mar Kaneohe Bay, HI as an Embedded Training Team during OEF deployment in Nawa, Afghanistan. Later Staff Sergeant Johnson was assigned to G Co for UDP Japan. He served as Weapons Platoon Sergeant and Company Gunnery Sergeant.
In February 2013, Staff Sergeant Johnson reported to Marine Forces Pacific Camp Smith, HI and served as headquarters and service Battalion First Sergeant and then assigned to G3 Current Operations as Watch Chief. He also served as Mobile Training Team Chief Advisor for Maldivian Marine Corps.
In May 2015 Gunnery Sergeant Johnson reported to 1st Bn, 7th Mar and was assigned as the Senior Enlisted Advisor for Security Cooperations Team Jordan and later assigned as Company Gunnery Sergeant for Suicide Charley. During this tour he has participated in Special Purpose Marine Air Ground Task Force (SPMAGTF) and was attached to Task Force SW and in direct support of the US Army 501st Paratroopers for Operation Resolute Support (ORS) in Kandahar, Afghanistan and Syria.
In March 2018 First Sergeant Johnson was assigned as Inspector Instructor Site First Sergeant for MWSS 473 DET A, MAG 41 located at Naval Air Station Lemoore, CA.
In May 2021First Sergeant Johnson reported to 5th 11th Mar Camp Pendleton, CA where he served as Battery T First Sergeant and deployed in support of UDP 22.1 with 12th Marines Regiment Okinawa, Japan.
As of May 2022 SgtMaj Johnson is served as Battalion Sergeant Major for Combat Logistics Battalion 11, Camp Pendleton, CA where he deployed in support of Koa Moana 23.
In Jan 2024 SgtMaj Johnson was assigned to 1st Reconnaissance Battalion as the Battalion Sergeant Major, Camp Pendleton, CA.
In August of 2025, he assumed his current post as the Sergeant Major for Marine Corps Air Station Iwakuni, Japan.