Booz Allen Hamilton Holding Corporation ( Booz Allen Hamilton Holding Corporation (Booz Allen Holding) is a U.S. information technology consulting firm founded in 1914 and headquartered in Tysons Corner, Virginia, which provides management, technical and security services to government agencies and is one of the largest defense contractors in the United States; Booz Allen Holding also The company also provides corporate strategic planning, computer simulation and other civilian business services.