SgtMaj Maciel enlisted in the Marine Corps in November of 1995. Upon completion of recruit training at Marine Corps Recruit Depot San Diego, he reported to Marine Combat Training Battalion, Camp Pendleton, California for duty as a student. In May of 1996 after completing MCT, SgtMaj Maciel received orders to Motor Transport (MT) School, Ft. Leonard Wood, MO, for duty as a student.
In September of 1996, SgtMaj Maciel reported for duty to HQBN, 3rd Marine Division, he was assigned the duties of Hazardous Materials Noncommissioned Officer. In April of 1998, he deployed to Thailand in support of operation COBRA GOLD ’98.
In September of 1998of Dispatcher, SgtMaj Maciel reported for duty to HQSVC BN, 1st Force Service Support Group. He was assigned the duties, Training NCO, MT Instructor, Platoon Sergeant, and MT Operations Chief.
In January of 2002, Sergeant Major Maciel reported for duty to Drill Instructor School, for duty as a Drill Instructor Student. Upon successful completion of Drill Instructor School, he was assigned to “B” Company. He served in the billets of Drill Instructor and Senior Drill Instructor and Regimental Training Chief.
In March of 2005, SgtMaj Maciel reported for duty to HQBN, 1st Marine Division. He was assigned to Truck Company, HQBN, 1st Marine Division. He served in the billets of Platoon Sergeant and Company Gunnery Sergeant. He deployed in support of OPERATION IRAQI FREEDOM 2.2 and OPERATION IRAQI FREEDOM 6.8.
In April of 2008, SgtMaj Maciel reported for duty to Northwestern University, Chicago, Illinois for duty as the Assistant Marine Officer Instructor. He augmented the Instructor Cadre at Officer Candidate School in the summer 2009 and summer 2010.
In August of 2011, SgtMaj Maciel reported for duty to Marine Unmanned Aerial Vehicle Squadron 2, Cherry Point, North Carolina. He served in the billets of S-4 Staff Noncommissioned Officer and Detachment-A SNCOIC. He deployed in support of OPERATION ENDURING FREEDOM 12.1 and OPERATION ENDURING FREEDOM 12.2.
In March 2013, SgtMaj Maciel reported for duty to 2d Maintenance Battalion, 2d Marine Logistics Group, Camp Lejeune, NC. He was served as the Company First Sergeant, Motor Transport Maintenance Company, General Support Maintenance Company, and Engineer Maintenance Company.
In July 2015, Sergeant Major Maciel reported for duty to Headquarters and Support Battalion, Marine Corps Base, Camp Pendleton, CA. He was assigned to as the Company First Sergeant, Company “A”.
In May 2017, Sergeant Major Maciel reported for duty to 2d Battalion, 3d Marines, Marine Corps Base Hawaii where he served as the Battalion Sergeant Major. He deployed in support of the Unit Deployment Program to Okinawa, Japan.
In January 2019, Sergeant Major Maciel reported for duty to Combat Logistics Battalion 3, Combat Logistics Regiment 3, Marine Corps Base Hawaii to serve as the Battalion Sergeant Major.
Current personal decorations--Meritorious Service Medal, Navy Marine Corps Commendation Medal W/silver star in liew of sixth award, Navy and Marine Corps Achievement Medal w/4 gold stars in lieu of fifth award, Combat Action Ribbon and other campaign awards.