Booz Allen Hamilton Inc. (, informally: Booz Allen) is an American management consulting firm headquartered in Tysons Corner, Virginia, in Greater Washington DC, with 80 other offices throughout the United States. Its core business is the provision of management, technology and security services, to civilian government agencies, as a security and defense contractor to defense and intelligence agencies, and to civil and commercial entities. Their scope of services includes strategic planning, human capital and learning, communications, operational improvement, information technology work, systems engineering, organizational change efforts, computer modeling and simulation, program management, assurance and resilience, and economic business analysis.