Christian P. Illek is a businessperson who has been at the head of 6 different companies. Presently, Dr. Illek occupies the position of Chairman-Supervisory Board for Deutsche Telekom Services Europe SE and Chief Financial Officer of Deutsche Telekom AG, Chairman-Supervisory Board at T-Systems International GmbH and Chairman-Supervisory Board of T-Systems Enterprise Services GmbH (both are subsidiaries of Deutsche Telekom AG). Christian P. Illek is also on the board of T-Mobile US, Inc.

Dr. Illek previously was Chairman at Buyin SA, Chairman-Supervisory Board at Deutsche Telekom Services Europe AG, Chief Executive Officer & Managing Director at Microsoft Deutschland GmbH, Marketing Director at Telekom Deutschland GmbH and Marketing Director of T-Mobile International AG.

Dr. Illek received an undergraduate degree from Ludwig-Maximilians-Universität München.