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The current secretary of defense is Robert Gates. The role of the Secretary of Defense is to be the principal defense policy advisor to the President and is responsible for thâ¦e formulation of general defense policy related to all matters of direct and primary concern to the Department of Defense, and for the execution of approved policy.
The DoD is led by the Secretary of Defense, a cabinet-level position appointed by the President and subject to confirmation by the U.S. Senate. The Secretary of Defense is assisted by a variety of under secretaries and assistant secretaries who manage specific functions.ne of DoDâs most critical offices, the Defense Contract Management Agency (DCMA) oversees the purchase of high-priced weapons systems. The DCMA is responsible for hundreds of thousands of contracts that have a collective value of $1.65 trillion.