CSG Systems International, Inc. also known as CSG International, is an American multinational corporation headquartered in the City of Englewood, United States. Neal C. Hansen and Dr. George Haddix founded the company in 1994 as CSG Holdings, Inc. and took it public on the NASDAQ in 1996. CSG maintains both local and international offices in North America, Asia Pacific, Europe, Latin America, the Middle East, the Caribbean and Africa. It operates mainly in the communications industry and provides in 35 offices spread around 21 countries, services related to Business Support Systems and Operations Support Systems. Its list of clients includes leaders in the fixed, mobile and next-generation networks industry like AT&T, Bharti, Comcast, DISH, Telefonica, Time Warner Cable and Virgin Mobile.