Sergeant Major Bansah enlisted in the Marine Corps in November 2000, and completed recruit training at MCRD, Parris Island, South Carolina, in February 2001. Following recruit training, Sergeant Major Bansah attended Marine Combat Training and MOS school at Camp Johnson. Upon completion, he was assigned the MOS of 0121, Personnel Administrative Clerk and was promoted to Private First Class. Sergeant Major Bansah was transferred to 12th Marine Regiment, 3d Marine Division, Okinawa, Japan in June 2001. Sergeant Major Bansah was re-assigned to III MEF Headquarters Group as a Legal Administrative Clerk in July 2001. With III MEF Headquarters Group, Sergeant Major Bansah deployed in support of exercises Ulchi Focus Lens, Balikatan, Cobra Gold, Crocodile, Operation Enduring Freedom, and was meritoriously promoted to the ranks of Lance Corporal, Corporal, and Sergeant.
Sergeant Major Bansah was transferred to Headquarters and Service Battalion, Marine Corps Base Quantico in September 2004 as Personnel Administrative Audit Chief. After a year in this assignment, he was recognized by MCAAT during their inspection, augmented to the CMC IG Inspection Team, and was meritoriously promoted to the rank of Staff Sergeant in April 2007.
Sergeant Major Bansah received orders in June 2007 to Region 6, Pretoria, South Africa, Marine Corps Embassy Security Group as an Administrative Chief where he remained until receiving orders to MSG School as a student detachment commander in September 2009. Upon graduation, he was assigned to Marine Security Guard Detachment Colombo, Sri Lanka where he was promoted to Gunnery Sergeant. In July 2011, Sergeant Major Bansah was transferred to Luanda, Angola as the Detachment Commander. In December 2012, Sergeant Major Bansah received orders to Headquarters and Service Battalion, 2d Marine Division where he served as an Administrative Chief. In March 2014, Sergeant Major Bansah was frocked to First Sergeant and transferred to 2d Battalion, 2d Marines where he served as the Company First Sergeant for Easy Company, Headquarters and Service Company, and Weapons Company. With 2d Battalion, 2d Marines, Sergeant Major Bansah participated in deployments to Morón, Spain & NAS Sigonella, for Special Purpose MAGTF-Crisis Response-Africa; Al Qwerah, Jordan, for Exercise EAGER LION; and Okinawa, Japan, as part of the Unit Deployment Program.
In January 2017, Sergeant Major Bansah was transferred to Headquarters and Service Battalion where he served the Marines of Capabilities and Development Directorate, Marine Corps Warfighting Laboratory, and the Marine Corps Combat Development Command as the Company First Sergeant, Combat Development Company. In April 2018, Sergeant Major Bansah was assigned as the Company First Sergeant, Tenant Activities Company where he served the Marines of Manpower and Reserve Affairs Department of Headquarters Marine Corps, Marine Corps Recruiting Command, Marine Corps Systems Command, the Marine Corps Operational Test and Evaluation Agency, and the Joint Non-Lethal Weapons Directorate. In September 2019, Sergeant Major Bansah was transferred to Marine Medium Tiltrotor Squadron 263, where he served as the Squadron Sergeant Major. During this time, he participated in deployments to Morón, Spain & NAS Sigonella, for Special Purpose MAGTF-Crisis Response-Africa as the ACE Sergeant Major with 22nd Marine Expeditionary Unit. In July 2021, Sergeant Major Bansah was transferred to Marine Light Attack Helicopter Squadron 167, where he served as the Squadron Sergeant Major until he received orders to Marine Air Control Group 28 as the Command Senior Enlisted Leader.
In October 2025, Sergeant Major Bansah was assigned as the Command Senior Enlisted Leader of Marine Corps Embassy Security Group.
Sergeant Major Bansah holds a bachelor's degree in human resource management from the American Public University. His personal decorations include the Meritorious Service Medal with two gold star, Navy Marine Corps Commendation Medal with two Gold Stars, and the Navy Marine Corps Achievement Medal with three Gold Stars.