List / Directory of Defense Corporations focusing on Aerospace, Defense, Homeland Security, Intelligence, IT, Systems Integration, and Outsourcing and by areas of operation, capabilities, corporate evolution, and noteworthy subsidiaries. All these highly-diversified corporations offer services wholly or partially overlapping private security and private military service provision: the global defense sector at a glance!

Science Applications International Corp (SAIC)

SAIC is a premier technology integrator with a portfolio of offerings across the defense, space, civilian, and intelligence markets that include secure high-end solutions in engineering, IT modernization, and mission solutions. With engineering and technical and mission expertise in areas from vehicle platforms to information technology and training, we are a full partner with the U.S. military to help maintain superiority in any battle against any adversary. [Information retrieved from the company's website in June 2021]: https://www.saic.com/

• Serco Group. Serco supports governments, agencies and companies who seek a trusted partner with a solid track-record of providing assured service excellence. Our people offer operational, management and consulting expertise in the aerospace, defence, education, health, home affairs, local government, science, technology, transport and the commercial sectors. We advise policy makers, design innovative solutions, integrate systems and - most of all - deliver to the public. [Information retrieved from Home on 1 January 2007]: http://www.serco.com/

- Serco North America:: http://www.serco-na.com/

• SPX Corporation. SPX Corporation is a global multi-industry manufacturing leader committed to operational excellence and execution. Operating in more than 20 countries with approximately 15,000 employees, SPX is a provider of Flow Technology, Test and Measurement, Thermal Equipment and Services, and Industrial Products and Services. [Information retrieved from Corporate Overview on 1 January 2007]: http://www.spx.com/

• TASC Inc. Our knowledge covers critical areas such as intelligence technologies, space and aviation systems, emerging computing technologies, and test and evaluation. Our areas of expertise include: Aviation Systems, CBRNE, Cloud Architecture and Engineering, Geospatial Intelligence, Mobile Wireless Communications, Modeling and Simulation, Signals Intelligence, Space Systems, Test and Evaluation. [Information retrieved from Essential Knowledge on December 1, 2012]: http://www.tasc.com/

• Thales Group. Thales is a leading international electronics and systems group, serving defence, aerospace and security markets worldwide, supported by a comprehensive services offering. The group's civil and military businesses develop in parallel to serve a single objective: the security of people, property and nations. Thales employs 70,000 people in 50 countries and generates annual revenues of more than EUR13bn. [Information retrieved from Profile on 1 January 2007]: http://www.thalesgroup.com/

• Ultra Electronics. We are a defence, security, transport and energy company with a long, consistent track record of development and growth. Operationally, Ultra is organised into three divisions: Aircraft & Vehicle Systems, Information & Power Systems and Tactical & Sonar Systems, offering support to its customers through the design, delivery and support phases of a programme. [Information retrieved from main page on 31 August 2010]: http://www.ultra-electronics.com/

• United Technologies Corporation. UTC is a diversified company whose products include Carrier heating and air conditioning, Hamilton Sundstrand aerospace systems and industrial products, Otis elevators and escalators, Pratt & Whitney aircraft engines, Sikorsky helicopters, UTC Fire & Security systems and UTC Power fuel cells. [Information retrieved from About UTC on 30 August 2010]: http://www.utc.com/

- Sikorsky Aircraft Corporation. We are leaders in the design, manufacture and service of military and commercial helicopters; fixed-wing aircraft; spare parts and maintenance, repair and overhaul services for helicopters and fixed-wing aircraft; and civil helicopter operations. [Information retrieved from About Sikorsky on 31 August 2010]: http://www.sikorsky.com/

• VT Group. The Company has its roots in two shipbuilders, Vosper and Thornycroft, who both started out in the late 19th Century. The two companies merged in 1966. In 2002 the Company changed its name to become VT Group plc – a move driven by the Company’s successful diversification programme, which has seen VT become a major player in the civil and defence support services markets. [Information retrieved from History on 1 January 2007]: http://www.vtplc.com/

• WorleyParsons. We are the leading provider of professional services to the energy, resource and complex process industries. We provide services to the following sectors; Hydrocarbons, Minerals & Metals, Infrastructure, and Power. [Information retrieved from About Us on 2 December 2006]: http://www.worleyparsons.com/