Secretary of Defense (SECDEF)

Assistant Secretary General for Defense Investment

Assistant Secretary General for Defense Policy and Planning

Assistant Secretary of Defense (ASD)

Office of the Secretary of Defense (OSD)

Under Secretary of Defense (USD)

Under Secretary of Defense for Acquisition, Technology, and Logistics (USD AT&L)

Under Secretary of Defense for Intelligence USD(I)

office of the under secretary of defense for acquisition and technology

Assistant Secretary General (ASG)

Assistant Secretary General for Executive Management

Assistant Secretary General for Operations

Assistant Secretary General for Political Affairs and Security Policy

Assistant Secretary General for Public Diplomacy

Assistant Secretary of the Army (Manpower and Reserve Affairs)

Mission of the Representative of the Secretary-General in the Dominican Republic (DOMREP)

Office of the Secretary of the Navy

Office of the Special Envoy of the Secretary-General for the future status process for Kosovo (UNOSEK)

Office of the Special Representative of the Secretary-General for West Africa (UNOWA)

Private Office of the Secretary General

Secretary General (SG)

Secretary General’s Close Protection Unit

Secretary of State

Secretary of the Air Force (SAF)

Secretary of the Army (SA)

Secretary of the Navy (SN; SECNAV)

Strategic and Theater Nuclear Forces Policy Deputy Assistant Secretary

perimeter defense (all-around defense)

beach defense mine / beach-defense mine

active layered theatre (ballistic) missile defense (ALTBMD)

aerospace defense command

air defense (AD)

Air defense and Airspace Management Directorate (NATO)