| 1984–1987 |
Ph.D. student, Dept of Plant Taxonomy and Ecology, Eötvös University, Budapest |
| 1987–1995 |
Research fellow, Ecological Modelling Research group of the Hungarian Academy of Sciences at Eötvös University, Budapest |
| 1991–1992 |
Research fellow, National Institute for Medical Research, London |
| 1992–1993 |
Fellow, Wissenschaftskolleg zu Berlin |
| 1994 |
Guest professor, University of Zürich |
| 1994–1995 |
Fellow, Collegium Budapest |
| 1995–1997 |
Associate professor, Dept of Plant Taxonomy and Ecology, Eötvös University, Budapest |
| 1995– |
Permanent fellow, Collegium Budapest |
| 1997– |
Professor, Dept of Plant Taxonomy and Ecology, Eötvös University, Budapest |
| 1995–2002 |
Head of Dept of Plant Taxonomy and Ecology, Eötvös University, Budapest |
| 2007– |
Core team member, The Parmenides Foundation, München |