Since 2023 EUCOR Excellence Chair “Water and Sustainability”, Earth and Environmental Science Institut at the University of Strasbourg, France & Karlsruhe Institut of Technology, Germany
Since 2014 UNESCO Chair for “Rivers and Heritage/River Culture”, University of Tours, France (renewed in 2018 and 2022)
Since 2010 Full Professor in Aquatic Ecology, Department of Urban and Landscape Planning, PolyTech Tours and Interdisciplinary Research Cluster for Cities, Territories, Environment and Society (CITERES-CNRS UMR 7324), University of Tours, France
2007-2010 Assistant professor, University of Konstanz, build-up of the work group “Aquatic-Terrestrial Interaction Ecology”, lecturer for 9 courses.
2004-2007 PI for the subproject on organic matter processing, DFG Collaborative Reseach Center SFB 248 “Littoral Ecology of Lake Constance” , University of Konstanz,
2003 DFG Position, Project “Global organic matter processing project”, University of Konstanz and Max Planck Institute of Limnology, Plön
2002 Max Planck Research Fellow, EAWAG - Swiss Federal Institute of Aquatic Sciences and Technology, Kastanienbaum, Switzerland
1998-2014 Honorary professor, Federal University of Mato Grosso, Dept. of Lifesciences (MSc. and PhD course in Ecology and Conservation of Biodiversity)
1994-2001 Executive coordinator “Pantanal Ecology Project” (staff: 40) and researcher at the Max Planck Institute of Limnology, Plön
1993-1996 Doctorate research fellow at the Max Planck Institute of Limnology, Plön.
1988-1992 Research assistant, Natural History Museum at Mainz, University of Konstanz, Bundesanstalt für Gewässerkunde at Koblenz and Max Planck Institute of Limnology, Plön
1985-1987 Civil Service (Environmental education, conservation strategies, excursions, workshops, public relations) at DBV/NABU Naturschutzzentrum Rheinauen, Gaulsheim, Germany