According to 10 U.S.C.§ 201 of the United States Code, the director of the NSA is recommended by the secretary of defense and nominated for appointment by the president. The nominee must be confirmed via majority vote by the Senate. In accordance with Department of Defense Directive 5100.20, dated 23 December 1971, the director of the NSA must always be a commissioned officer of the military services. As the assignment is currently part of a tri-hatted position, the director of the NSA is appointed to the grade of a four-star general or admiral during the period of his incumbency. The director's deputy is always a technically experienced civilian.[1]
AFSA directors
The Armed Forces Security Agency was the predecessor to the National Security Agency and existed from 1949 to 1952.
^Alexander was originally a lieutenant general when he first assumed office on 1 August 2005. He was promoted to general when he assumed the additional assignment as Commander, U.S. Cyber Command on 21 May 2010.