Computer Sciences Corporation is an American information technology and business services company headquartered in Falls Church, Virginia, USA. CSC predominantly provides IT services in the following areas: systems integration and professional services; enterprise application development and management; application software for the financial services industry; business process outsourcing; managed hosting services; and application and IT infrastructure outsourcing. CSC's consulting and professional services include advising clients on the acquisition and utilization of IT and on business strategy, security, modeling, simulation, engineering, operations, change management and business process reengineering. CSC serves Fortune Global 1000 companies in fifteen industries and national and local governments. CSC employs about 93,000 people in 90 countries and ranks among the largest outsourcing companies in the world.

Customer Operations Performance Center Inc. (COPC Inc.) provides consulting services related to operations management and performance improvement for customer contact center and Business Process Outsourcing (BPO) services.

Xerox Corporation is a Fortune 500 global document management company. Xerox is headquartered in Norwalk, Connecticut, though its largest population of employees is based in and around Rochester, New York. On September 28, 2009, Xerox announced the intended acquisition of Affiliated Computer Services for $6.4 billion. The deal closed on February 8, 2010.

Command Consulting Group is an international security and intelligence consulting firm headquartered in Washington, D.C.. CCG provides advisory services for governments, corporations, and high net worth private individuals.

Cognizant Technology Solutions Corp is an American multinational corporation that provides custom information technology, consulting, and business process outsourcing services. It is headquartered in Teaneck, New Jersey, United States. Cognizant is listed in the NASDAQ-100 and the S&P; 500 indices. Originally founded as an in-house technology unit of Dun & Bradstreet in 1994, Cognizant started serving external clients in 1996.

Acentra delivers a broad portfolio of information technology (IT) and business process outsourcing (BPO) solutions to a diverse base of federal, state and local government agencies, and commercial enterprises. Headquartered in Rockville, Maryland with offices throughout the U.S., the company has expertise in industries, including Defense, Energy, Financial Services, Healthcare, Homeland Security/Law Enforcement and Transportation.

Configuration Management, Inc. is a provider of technology services including the design, development, systems integration, testing and operational support of application development platforms and systems.

Cliff Consulting provides services in project management, in the assessment, design, and implementation of improvements to business operations and in the implementation of information technology.

Capgemini is a French global IT services company, one of the world's largest management consulting, outsourcing and professional services companies with a staff of 114,274 operating in 40 countries. It is headquartered in Paris and was founded in 1967.

The Capital Markets Company N.V., referred to as Capco, is a global business and technology consultancy based in Antwerp, Belgium with offices in financial centers across North America, Europe, Asia, and Africa. Capco is a subsidiary of FIS company based in Jacksonville, Florida. Capco works only in the financial services industry, unlike the Big Four professional services firms. As of the 1st November 2015, Capco had more than 3,000 employees internationally, and 23 offices.