Under Secretary of Defense for Research and Engineering Guides Defense Science and Technology Strategy
The Under Secretary of Defense for Research and Engineering (USD(R&E)) serves as the Chief Technology Officer (CTO) for the U.S. Department of Defense (DoD). This office, established under 10 U.S. Code § 133a, is responsible for setting the strategic direction, policy frameworks, and budgetary priorities for defense science and technology. The USD(R&E) is appointed by the President with Senate confirmation and must possess significant background in science, technology, or engineering. The office oversees three principal divisions: Science and Technology (S&T), Critical Technologies, and Mission Capabilities. It also supervises key defense agencies like DARPA and the Missile Defense Agency (MDA). The USD(R&E) manages research funding across basic research (Budget Activity 6.1), applied research (6.2), and advanced technology development (6.3), enforcing strict compliance mandates including Controlled Unclassified Information (CUI) protection, cybersecurity standards, and research security disclosures.