| 1986-1991 | Studies of Forestry, University of Natural Ressources and Life Sciences, Vienna |
| 1990-1991 | Fullbright Scholar, Forestry School, Virginia Tech, Blacksburg |
| 1991-1994 | Doctoral Student, Institute of Forest Growth, University of Natural Ressources and Life Sciences, Vienna |
| since 1992 | Lecturer, University of Natural Ressources and Life Sciences, Vienna |
| 1994 | Promotion (with distinction). University of Natural Ressources and Life Sciences, Vienna |
| 1994-1999 | University Assistant, Institute of Forest Growth, University of Natural Ressources and Life Sciences, Vienna |
| 1995 | Lecturer, Forestry School, Virginia Tech, Blacksburg |
| 1995-1996 | Schrödinger-Fellow and Lecturer, School of Forestry, Virginia Tech, Blacksburg and University of Montana, Missoula |
| 1996 | Lecturer, School of Forestry, University of Montana, Missoula |
| 1998 | Lecturer, University Ulm |
| 1999 | Habilitation, University of Natural Ressources and Life Sciences, Vienna |
| 2002 | Guest Researcher (5 months), European Forest Institute, Joensuu |
| since 2001 | Editor, Austrian Journal of Forest Sciences |
| since 2002 | Head, Expert Commitee for Forest Management, Austrian Forestry Association |
| since 2003 | Environmental Panel, Finnish Academy of Science and Letters |
| 2003-2004 | Lecturer, University of Wales, Bangor |
| 2005 | Lecturer, TEMPUS Projekts Mari State University, Yoshkar-Ola |
| 2005-2007 | Associate Editor of the Canadian Journal of Forest Research |
| since 2005 | Vice-chairman and Co-initiator of the Austrian Forest Alumni Association |
| since 2006 | Editor, Forest Ecology and Management |
| since 2007 | University Professor and Deputy Director for Forest Ecosystem Management, University of Natural Ressources and Life Sciences, Vienna |
| since 2008 | Chairman, Scientific Advsiory Board des European Forest Institute (EFI) |
