1994 Research Fellow, Imperial College London, Department of Biochemistry
1996 Research fellow at Bielefeld University
2001 Habilitation in Plant Molecular Biology
2000 Member of the DFG-Collaborative Research Centre FOR 387.
2004 Research Fellow at the University of Queensland/Australia
2006 Appointment as Head of Life Sciences of the European Science Foundation (ESF) Strasbourg
2006 Member of the DFG-Collaborative Research Centre FOR 504.
2007 Australian Research Council Fellow at the University of Queensland
2007 Head of AlgaeBioTech Young Investigators Group at Bielefeld University
2007 Professorial appointment at Bielefeld University
2007 Co-Director of the international Bioenergy Research Consortium SolarBioFuels
2007 Member of the Centre for Biotechnology (CeBiTec) at Bielefeld University
2008 Young Scientist van't Hoff fund award of the Dutch Royal Society
2008 Coordinator and Speaker of the Bioenergy consortium Bioenergie-OWL
2008 Coordinator of the BMBF research consortium on “Systems Biology of Hydrogen Production with Microalgae”
2009 Appointment as Full Professor (W3) at the Department of Biology of Bielefeld University
2009 Appointment as Scientific Expert to the 7th framework program of the European Commission
2010 Appointment as Speaker of the Institute of Biochemistry & Bioengineering at the Center for Biotechnology (CeBiTec)
2012 Appointment as Editorial Board Member of "Algological Studies"
2014 Appointment as scientific expert to the EU-H2020 program
2015 Appointment as Scientific Director of the Center for Biotechnology (CeBiTec)