---
kind: "unit"
title: "10"
title_heading: "Armed Forces"
key: "stA/ptI/ch4"
level: "chapter"
label: "Chapter 4"
heading: "Office of the Secretary of Defense"
release: "119-102"
date: "2026-07-12"
url: "https://uscodex.org/usc/10/stA-ptI-ch4"
sections_count: 36
---

# Chapter 4 — Office of the Secretary of Defense

Title 10 — Armed Forces › Subtitle A — General Military Law › Part I — Organization and General Military Powers

## Sections

- [§131. Office of the Secretary of Defense](/usc/10/131.md)
- [§132. Deputy Secretary of Defense](/usc/10/132.md)
- [§132a. Performance Improvement Officer](/usc/10/132a.md)
- [§133. Repealed.](/usc/10/133.md)
- [§133a. Under Secretary of Defense for Research and Engineering](/usc/10/133a.md)
- [§133b. Under Secretary of Defense for Acquisition and Sustainment](/usc/10/133b.md)
- [§134. Under Secretary of Defense for Policy](/usc/10/134.md)
- [§134a. Repealed.](/usc/10/134a.md)
- [§134b. Repealed.](/usc/10/134b.md)
- [§135. Under Secretary of Defense (Comptroller)](/usc/10/135.md)
- [§136. Under Secretary of Defense for Personnel and Readiness](/usc/10/136.md)
- [§136a. Repealed.](/usc/10/136a.md)
- [§137. Under Secretary of Defense for Intelligence and Security](/usc/10/137.md)
- [§137a. Deputy Under Secretaries of Defense](/usc/10/137a.md)
- [§138. Assistant Secretaries of Defense](/usc/10/138.md)
- [§138b. Repealed.](/usc/10/138b.md)
- [§138c. Repealed.](/usc/10/138c.md)
- [§138d. Repealed.](/usc/10/138d.md)
- [§139. Director of Operational Test and Evaluation](/usc/10/139.md)
- [§139a. Director of Cost Assessment and Program Evaluation](/usc/10/139a.md)
- [§139b. Secretariat for Special Operations; Special Operations Policy and Oversight Council](/usc/10/139b.md)
- [§139c. Repealed.](/usc/10/139c.md)
- [§139e. Renumbered §§ 139b, 139c](/usc/10/139e.md)
- [§140. General Counsel](/usc/10/140.md)
- [§140a. Renumbered § 422](/usc/10/140a.md)
- [§140b. Renumbered § 423](/usc/10/140b.md)
- [§140c. Renumbered § 130](/usc/10/140c.md)
- [§141. Inspector General](/usc/10/141.md)
- [§142. Chief Information Officer](/usc/10/142.md)
- [§143. Office of the Secretary of Defense personnel: limitation](/usc/10/143.md)
- [§144. Director of Small Business Programs](/usc/10/144.md)
- [§145. Principal Advisor on Countering Weapons of Mass Destruction](/usc/10/145.md)
- [§146. Renumbered § 198](/usc/10/146.md)
- [§147. Repealed.](/usc/10/147.md)
- [§148. Joint Energetics Transition Office](/usc/10/148.md)
- [§149. Office of Strategic Capital](/usc/10/149.md)