CHRISTOPHER R. HENRY Principal Deputy Under Secretary of Defense for Policy Ryan Henry became Principal Deputy Under Secretary of Defense for Policy on 7 February 2003. In this role, he provides advice and assistance to the Secretary of Defense, Deputy Secretary of Defense and the Under Secretary of Defense for Policy on national security policy, military strategy, and defense policy.  Printer-friendly Version  Email A Copy About DefenseLink DoD Inspector General Freedom of Information Privacy & Security External Link Disclaimer Web Policy Contact Us USA.gov