Deutsche Telekom AG
- The former sole telecom incumbent in Germany, is the biggest telecom company in Europe.
T-Systems International GmbH
- A division of the Deutsche Telekom, is a leading global service provider and system integrator with combined expertise in both information technology and telecommunications.
DETECON International GmbH
- Represents the Technology and Management Consulting wing of T-Systems International.
DETECON AL SAUDIA CO. LTD. (DETASAD)
- A subsidiary of Detecon International, is utilizing the worldwide, vast experiences and expertise of Deutsche Telecom Group in the Kingdom of Saudi Arabia.