| 2019 |
Professor at Tianjin Institute of Industrial Biotechnology. Chinese Academy of Sciences, China |
| 2019 |
Return to Mülheim |
| 2011 |
Starting September 1st : Emeritus-Status and Hans-Meerwein-Research-Professor at Philipps-Universität Marburg as external Group Leader of the Max-Planck-Institute |
| 1993 - 2011 |
Chairman of the Studiengesellschaft Kohle mbH, SGK (Patent Department of the Institute) |
| 1993 - 2002 |
Managing Director of the Max-Planck-Institut für Kohlenforschung |
| 1992 - 2010 |
Honorary Professor at Ruhr-Universität Bochum |
| 1991 - 2011 |
Director at the Max-Planck-Institut für Kohlenforschung |
| 1989 - 1990 |
Guest Professor at Florida State University/USA |
| 1980 - 1991 |
Full Professor at University of Marburg |
| 1978 - 1980 |
Associate Professor at University of Bonn |
| 1978 |
Guest Professor at University of Wisconsin/USA |
| 1972 - 1978 |
Assistant Professor (Habilitand/Dozent) at University of Marburg |
| 1971 - 1972 |
Post-Doc with R. W. Hoffmann at University of Marburg |
| 1969 |
Doctoral degree, University of Göttingen with U. Schöllkopf |
| 1967 |
Master degree, University of Michigan, Ann Arbor/USA |
| 1965 |
Bachelor degree, Washington University, St. Louis/USA |
| 1952 |
Immigration to the USA |
| 1943 |
Born August 13, 1943 in Hirschberg/Germany |