| Sept. 19 to present | Associate Vice President (CIO), University of Cologne. |
| March 04 to Aug. 19 | Head of the Institute for Theoretical Information Technology, Faculty of Electrical Engineering and Information Technology, RWTH Aachen University. |
| Aug. 14 to July 18 | Pro-rector for Research and Structure at RWTH Aachen University. |
| Jan. 12 - Dec. 14 | Chair of the IEEE Information Theory Society Germany chapter. |
| April 12 - July 14 | Speaker of the board of deans at RWTH Aachen University. |
| Sept. 11 - July 14 | Dean of the Faculty of Electrical Engineering and Information Technology. |
| Jan. 10 - Dec. 11 | Chair of ITG/VDE Technical Committee 5.1, Information and System Theory. |
| March 11 | Elected member of the North-Rhine Westphalia Academy for Sciences and Arts. |
| Oct. 05 - Sept. 09 | Associate editor for Information Theory of the European Transactions on Telecommunications (ETT). |
| Febr. 08 - April 08 | Invited as Erskine Fellow at the Dept. of Electrical Engineering, University of Canterbury, Christchurch, New Zealand. |
| Sept. 05 - Oct. 05 | Research visit at the Dept. of Electrical Engineering, The University of Melbourne. |
| June 02 | Awarded the Innovationspreis 2002 of the Vodafone Stiftung fur Forschung. |
| Febr. 01 - April 01 | Invited as Erskine Fellow at the Dept. of Computer Science and Electrical Engineering, University of Canterbury, Christchurch, New Zealand. |
| Oct. 99 - Dec. 99 | Research visit at the Dept. of Electrical and Electronic Engineering, The University of Melbourne, Australia. |
| March 99 - April 99 | Holder of the IBM International Chair in Computer Science, Brussels Free University, Belgium. |
| Oct. 98 | Co-founder of the spin-off enterprise Telecommunication Network Consulting . |
| March 97 - April 97 | Research visit at the Dept. of Mathematical Sciences, Johns Hopkins University, Baltimore. |
| Oct. 94 - March 95 | Research visit at the Dept. of Computer Science, University of Canterbury, Christchurch, New Zealand. |
| Okt. 89 - Febr. 04 | Professor for Stochastics at RWTH Aachen University, Faculty of Natural Sciences. |
| Aug. 87 - Sept. 89 | Lecturer and research fellow at Augsburg University. |
| Sept. 88 | Venia legendi (Habilitation) at Augsburg University. |
| Oct. 86 - July 87 | Lecturer at the European Business School, Oestrich, Germany. |
| Febr. 78 - Sept. 86 | Research assistant at RWTH Aachen University. |
| Dec. 85 | Venia legendi (Habilitation) at RWTH Aachen University. |
| Jan. 81 | Doctoral dissertation (summa cum laude) in Mathematics. |
| Oct. 72 - Jan. 78 | Education in Mathematics, minor subject Industrial Management and OR, at RWTH Aachen University. |
