Booz Allen Hamilton Holding Corporation (Booz Allen Holding) is a united States-based company that provides of management and technology consulting services to the United States government in the defense, intelligence and civil markets. In addition, it provides management and technology consulting services to corporations, institutions, and not-for-profit organizations. During the fiscal year ended March 31, 2012 (fiscal 2012), it derived 98% of its revenue from services provided to more than 1,200 client organizations across the United States government under more than 5,800 contracts and task orders. During fiscal 2012, it derived 90% of its revenue in fiscal 2012 from engagements, for which it acted as the prime contractor. On November 30, 2012, the Company purchased the Defense Systems Engineering and Support (DSES) division of ARINC Incorporated.