The Office of the Secretary of Defense (OSD) refers to the executive department within the United States Department of Defense (DoD) that is responsible for providing guidance and oversight to the entire defense establishment. With its origins dating back to 1947, the OSD serves as the civilian leadership at the topmost level of the DoD hierarchy.
The primary purpose of the OSD is to advise and assist the Secretary of Defense in carrying out their duties and responsibilities, which can involve formulating and implementing defense policies, strategies, and objectives. The OSD ensures the coordination of defense activities across various military departments and agencies, as well as oversees the preparation and submission of the defense budget to Congress.
Moreover, the OSD plays a vital role in managing the relationships between the DoD and other governmental departments, foreign governments, international organizations, and the private sector. It collaborates closely with the military departments, including the Army, Navy, Air Force, and Marine Corps, to ensure effective communication, coherence, and synchronization in the execution of defense policies.
The Office of the Secretary of Defense is led by the Secretary of Defense, who is the principal defense policy advisor to the President. The Secretary is supported by various under secretaries, deputy under secretaries, assistant secretaries, and other officials who collectively form the OSD's personnel. Additionally, the OSD also includes specialized offices and agencies responsible for specific areas such as acquisition, intelligence, policy, and personnel resources management.
In essence, the Office of the Secretary of Defense acts as the central hub of decision-making, management, and coordination within the DoD, facilitating the effective functioning of the entire defense establishment and contributing to the national security of the United States.
