Robert ODonnell

Headquarters and Service Company (H&S Co.), Headquarters Battalion (HQBn), Headquarters Marine Corps (HQMC), located at Henderson Hall in Arlington, Virginia, serves as the primary administrative and support unit for HQMC personnel. Established to provide essential command, control, administrative, and logistical support, H&S Co. ensures the effective functioning of the Marine Corps' senior leadership and staff. Situated adjacent to the Pentagon, Henderson Hall has been a key site for Marine Corps operations in the National Capital Region since its establishment in 1942. Over the decades, H&S Co. has played a vital role in supporting the Marine Corps’ mission at the highest levels, adapting to evolving operational requirements and providing critical support to Marine leaders and their staffs.

**HBHQMC** stands for Headquarters Battalion, Headquarters Marine Corps. This unit serves as the central administrative and operational support battalion for Headquarters, United States Marine Corps, located in Washington, D.C. Established to coordinate the activities and provide essential services for the senior leadership and staff of the Marine Corps, HBHQMC traces its lineage to the early 20th century, evolving to meet the changing needs of the Corps. Over the decades, the battalion has played a vital role in supporting Marine Corps operations, ceremonial functions, and crisis response efforts in the National Capital Region. Its Marines and Sailors uphold a tradition of professionalism and readiness, ensuring the seamless functioning of the Marine Corps’ highest command echelon.