1983 – 1989: Junior Researcher at the Forest Genetic Institute, University of Göttingen
1991 - 1996: Project Coordinator for an Afforestation Project in China
1996 - 1999: Research Scientist in a Wild Cherry Certification Project, C. Appel, Darmstadt
2000 - 2006: Research Scientist at the Forest Genetic Institute, University of Göttingen
2006 - 2008: Forest Consultant in Field Testing of Forest Genetic Resources
2008 - 2009: National Coordinator of the European Network “Treebreedex”, North-West German Forest Research Station, Hannoversch-Münden
since 2009: Scientist at the von Thünen-Institute of Worldforestry, Hamburg | 
