Sergeant Major Janet Marrufo enlisted in the Marine Corps in Round Lake, IL in 2004. Upon completing Recruit Training at MCRD Parris Island, Marine Combat Training and military occupational school in Jacksonville, North Carolina for Personnel Administration School, Private First Class Marrufo was assigned to I Marine Expeditionary Unit, I Marine Headquarters Group, Camp Pendleton, CA.
In 2004, Private First Class Marrufo served as a legal and travel claim clerk for I Marine Headquarters Group, Group Personnel Administration Center. Shortly after, she was promoted to Lance Corporal and in charge of the limited duty section. During this time, Lance Corporal Marrufo was inspected by the Inspector General of the Marine Corps and received a Certification of Commendation. Headquarters Marine Corps sent to personnel administration centers throughout the Marine Corps her presentations and turnover binder as the benchmark for the limited duty program. She was nominated and won Marine of the Quarter board for I Marine Headquarters Group for third quarter 2005.
In 2006, Lance Corporal Marrufo was meritoriously promoted to the rank of Corporal. She was now in charge of the retirement and separation section. In October of 2006, Corporal Marrufo reported to the 13th Marine Expeditionary Unit, Camp Pendleton, CA to serve as administrative clerk. During this time, she deployed to Operation Iraqi Freedom 6-08 with the 13th MEU. While deployed she was assigned to a security detachment for explosive ordinance disposal. Throughout the assignment she completed approximately 60 improvised explosive device (IED) calls.
In November of 2007, Corporal Marrufo was meritoriously promoted to the rank of Sergeant. In January of 2008 Sergeant Marrufo reported to Headquarters and Support Battalion, Marine Corps Base, Camp Pendleton. She assumed duties as noncommissioned officer in charge of the retirement and separations section at the Installation Personnel Administration Center. After three months, the 13th MEU, requested she return. From April 2008 until December 2008, Sergeant Marrufo served as the 13th MEU Administrative Chief, a billet for a Gunnery Sergeant.
In January of 2009, Sergeant Marrufo reported to Recruiters School at MCRD San Diego. In March of 2009, she reported to Recruiting Station San Diego and served as a canvassing recruiter for Recruiting Sub-Station Chula Vista and Imperial Beach. She won multiple Recruiter of the Month and Recruiter of the Quarter awards throughout her recruiting duty and as a result she was meritoriously promoted to staff sergeant in January 2011.
After a successful special duty assignment tour, Staff Sergeant Marrufo reported to Headquarters and Support Battalion, Marine Corps Base, Camp Pendleton in May of 2012. She assumed duties for Marine Corps Installations West-Marine Corps Base, Camp Pendleton, G-1, adjutant section as the Administrative Chief. She also served as a Crisis Action Team member for the G-1 and assisted in 2014 Camp Pendleton Fire Evacuations.
In July of 2014, Staff Sergeant Marrufo served as the Protocol and Administrative Chief for Command Element, Marine Forces Central Command Forward in Manama, Bahrain. As a result of her performance she was meritoriously promoted to gunnery sergeant in April 2015. In August of 2015, Gunnery Sergeant Marrufo reported to the School of Infantry-West and served as the Administration Chief. In November 2016, Gunnery Sergeant served at 1st Combat Engineer Battalion as the Administration Chief. In March 2019, First Sergeant Marrufo served as the Inspector-Instructor First Sergeant at 3d Civil Affairs Group. In February 2022, First Sergeant served as the he Charlie Company First Sergeant, at 1st Radio Battalion.
Sergeant Major Marrufo is currently assigned as the Command Senior Enlisted Leader, for Marine Fighter Attack Squadron 311.
Sergeant Major Marrufo's personal awards include Meritorious Service Medal with gold star, Navy and Marine Corps Commendation with three gold stars, Navy and Marine Corps Achievement Medal with two gold stars and Combat Action Ribbon.