Chapter 4 - OFFICE OF THE SECRETARY OF DEFENSE
- Section 131 - Office of the Secretary of Defense
- Section 132 - Deputy Secretary of Defense
- Section 132a - Repealed
- Section 133 - Repealed
- Section 133a - Under Secretary of Defense for Research and Engineering
- Section 133b - Under Secretary of Defense for Acquisition and Sustainment
- Section 134 - Under Secretary of Defense for Policy
- Section 134a - Repealed
- Section 134b - Repealed
- Section 135 - Under Secretary of Defense (Comptroller)
- Section 136 - Under Secretary of Defense for Personnel and Readiness
- Section 136a - Repealed
- Section 137 - Under Secretary of Defense for Intelligence and Security
- Section 137a - Deputy Under Secretaries of Defense
- Section 138 - Assistant Secretaries of Defense
- Section 138a, 138b - Repealed
- Section 138c - Repealed
- Section 138d - Repealed
- Section 139 - Director of Operational Test and Evaluation
- Section 139a - Director of Cost Assessment and Program Evaluation
- Section 139b - Secretariat for Special Operations; Special Operations Policy and Oversight Council
- Section 139c - Repealed
- Section 139d, 139e - Renumbered
- Section 140 - General Counsel
- Section 140a - Renumbered
- Section 140b - Renumbered
- Section 140c - Renumbered
- Section 141 - Inspector General
- Section 142 - Chief Information Officer
- Section 143 - Office of the Secretary of Defense personnel: limitation
- Section 144 - Director of Small Business Programs
- Section 145 - Principal Advisor on Countering Weapons of Mass Destruction
- Section 146 - Renumbered
- Section 147 - Chief Diversity Officer
- Section 148 - Joint Energetics Transition Office
- Section 149 - Office of Strategic Capital