| 1980 | Diplom-Informatiker, Technical University Darmstadt, Germany, Advisor: Prof. Hisashi Kobayashi (Princeton University) |
| 1981 | M.Sc. In Computer Science, University of California at Los Angeles (UCLA), USA, Advisor: Prof. Wesley Chu |
| 1984 | Ph.D. In Computer Science, RWTH Aachen, Germany, Advisor: Prof. Otto Spaniol |
| 1985–1992 | Research Staff Member, IBM European Networking Center, Heidelberg, Germany |
| 1988 | Assignment to IBM T.J. Watson Research Center, Yorktown Heights, USA |
| 1992–2001 | Associate Professor of Distributed Systems, Johann Wolfgang Goethe-Univ. Frankfurt, Germany |
| 2000 | Guest Scientist / Sabbatical, Microsoft Research Center, Cambridge, United Kingdom |
| 2001–2004 | Full Professor of Intelligent Networks, Technical University Berlin, Germany |
| 2004 | Alexander von Humboldt South African Research Award |
| 2004 | Visiting Professor at University of Pretoria, South Africa |
| 2004–2021 | Full Professor of Distributed Systems, EECS Department, Univ. Kassel, Germany |
| 2006 | Visiting Professor at University of Pretoria, South Africa |
| 2007 | Member of panel Computer Science, European Research Council (ERC) (until 2013) |
| 2009 | General Co-Chair, 16th GI/ITG Conf. on Communications and Distributed Systems (KiVS), Kassel, Germany |
| 2011 | General Co-Chair, 5th IEEE Int. Conf. on Self-Adaptive and Self-Organizing Systems (SASO’11), Ann Arbor, Michigan, USA |
| 2011 | Guest scientist at SINTEF Research Lab and NTNU University, Trondheim, Norway |
| 2014 | Guest scientist at Fondazione Bruno Kessler (FBK), Trento, Italy |
| 2014 | Founding director of Scientific Center for Information Systems Design (ITeG), University of Kassel, Germany |
| 2016 | David Lorge Parnas Fellowship at LERO – the Irish Software Research Centre |
| 2017 | Guest scientist at LERO – the Irish Software Research Centre, Limerick and Dublin, Ireland |
| 2018 | Visiting professor, IMT School for Advanced Studies, Lucca, Italy |
| 2018 | Chair of Excellence Award, Universidad Carlos III de Madrid (UC3M), Madrid, Spain |
| 2019 | General chair of INFORMATIK 2019, the Annual Conference of the German Informatics Society |
| 2019 | Visiting Professor at Universidad Carlos III de Madrid (UC3M), Madrid, Spain |
| 2021 | Retirement |
