Defense Information Systems Agency Law and Legal Definition

The Defense Information Systems Agency (DISA) is an agency in the U.S. Department of Defense responsible for developing, fielding and operating information systems to provide combat support for the armed forces. It serves the needs of the President, Vice President, the Secretary of Defense, the Joint Chiefs of Staff, the Combatant Commanders, and the other Department of Defense Components under all conditions of peace and war. It provides command and control capabilities and enterprise infrastructure to continuously operate and assure a global net-centric enterprise in direct support to joint war fighters, National level leaders, and other mission and coalition partners across the full spectrum of operations.