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| 1963 - 69 | Studied theoretical electrical engineering at the Technische Hochschule Darmstadt |
| 1969 - 76 | Assistant in the Electrical Engineering Department at the Technische Hochschule Darmstadt |
| 1974 | Doctorate (Promotion) at the Faculty of Electrical Engineering, Technische Hochschule Darmstadt, Subject: Network Theory |
| 1976 - 81 | Member of the Research Center at SEL (ITT)/Stuttgart. Projektleader of Bundespost study and Fieldtrial DIGON (Digital Local Area Network). |
| 1981-86 | Head of the Department System Development / Large Systems at Telefonbau und Normalzeit /Frankfurt Development of ISDN-PABXs |
| Since 1986 | Professor for Communications Systems at the FernUniversität Hagen. Main interest: Communications Systems, Networks and Protocols; Network Security |
| 1989-94 | Head of the regional telecommunications initiative TELETECH NRW (Consultant and supervisor of 120 Telecommunications Projects). |
| 1990-96 | Member of the ISDN Research Commission NRW (Projects on ISDN Applicationsdesign and Technology Assessment) |
| Since 1992 | Director of the Institute of Telecommunications Research, Dortmund, Hagen, Wuppertal, Joint Institute of the Universities Hagen (Department of Electrical Engineering) and Wuppertal (Department of Economy). |
| Since 1995 | Member of management of mediaNRW, an initiative to promote the development and spreading of multimedia-applications as a whole and interactive services in enterprises, private households, and the public sector. |
| Since 1999 | Project manager of the research alliance Data security NRW |
