How many Under Secretaries of Defense are there?

The role of Under Secretary of Defense is a critical part of the United States Department of Defense, overseeing various key areas within the department. As of the latest information, which is up to October 2023, there are indeed six Under Secretaries of Defense, each responsible for specific functional areas like policy, intelligence, and acquisition and sustainment.

The structure of the Department of Defense is designed to ensure that there are specialized leaders for the diverse and complex challenges faced by the military and national security sectors. Each Under Secretary plays a vital role in addressing these challenges and ensuring coordinated efforts within their domains, which contributes to the overall effectiveness of the Department of Defense.