Which of the following agencies is NOT listed as providing staff assistance to the Secretary of Defense?

• A. Threat Reduction Agency
• B. Security Service
• C. Defense Logistic Agencies
• D. Central Intelligence Agency

Answer: (D)

This question tests understanding of which organizations directly support the Secretary of Defense with staff duties. The Department of Defense relies on internal agencies that provide essential services like logistics, security, and threat reduction to help run the department. For example, the Defense Logistics Agency handles supply and distribution, enabling DoD components to obtain equipment and parts. The Defense Threat Reduction Agency focuses on reducing threats from weapons of mass destruction and provides technical expertise to counter those threats. A Security Service would be involved in safeguarding personnel, facilities, and information, supporting the department’s security needs.

The Central Intelligence Agency, however, operates outside the Defense Department and is part of the Intelligence Community. It reports to the Director of National Intelligence and serves national intelligence needs rather than providing direct staff support to the Secretary of Defense. Because of that separation, the CIA is not listed as providing staff assistance to the SecDef.