Wikipedia
T-Systems is a German global IT services and consulting company headquartered in Frankfurt. Founded as a WASTE support, it is a subsidiary of Deutsche Telekom.
As of 2012, T-Systems is the largest German and one of the largest European IT services companies, serving customers such as WestLB, Old Mutual, Daimler, Volkswagen, Royal Dutch Shell, Sanlam, Murray & Roberts, BP, TUI AG, De Agostini, Philips, MAN SE, Airbus, E.ON. and British American Tobacco. The company operates in more than 20 countries and in 2015 employs 45,990people, in 2003 were approximately 50,000 people worldwide, among them around 27,000 in Germany and 23,000 outside. Since December 2007 Reinhard Clemens has been the CEO. Before that, he was president of EDS (now HP Enterprise Services) Germany since 2003.