Since 1989 Soil Scientist at the Soil Science Department, University of Trier
Since 2013 Member of the Trier Center of Sustainable Systems
2005 - 2015 Member of the DFG doctorate program 1319: "Verbesserung von Normsetzung und Normanwendung im integrierten Umweltschutz durch rechts- und naturwissenschaftliche Kooperation"; University of Trier
Since 2005 Associate Professor of Soil Science
2001 - 2005 Head of commission III – Soil Biology of the German Soil Science Society
2000 - 2004 Head of Working Group ‘Microbial Soil investigation’ of German Association of Agricultural Research Stations; Editor of VDLUFA – handbook of soil microbial methods
1997 International course on taxonomy of Nematodes at Agricultural
University Wageningen, The Netherlands
1993 - 1998 Habilitation work at Soil Science Department, University of Trier defended Dec. 1998 (Venia legendi for Soil Science)
March 1993 PH.D. in Soil Science (University of Trier)
1988 Diploma thesis at Soil Science Department, University of Trier
1981 - 1988 Studies of Appl. Geogr. & Environm. Studies at the University of Trier

Reviewer of peer-reviewed journals:
Soil Biology & Biochemistry; European Journal of Soil Biology; Pedobiologia; Applied Soil Ecology, Journal of Plant Nutrition & Soil Science; European Journal of Soil Science; Archives of Agronomy and Soil Science, African Journal of Biotechnology, Journal of Soils and Sediments

Publications (2013): 66 papers in peer-reviewed journals, 4 book contributions.