Since 05/2005	Head of the Nutrient Group (Junior Research Group)
09/2003-04/2005	Scientist at the MPI Bremen
01/2001-09/2003	Post doctoral fellowship, Prof. Dr. Bo Barker Jørgensen, Department of Biogeochemistry, Max-Planck-Institute of Marine Microbiology.
08/1996-12/2000	Graduate student in Geosciences; University of Utrecht. Graduated cum laude September 2001. Dissertation title: Mechanisms and biogeochemical implications of the mid-Cretaceous global organic carbon burial events. Advisor: Dr. Jaap S. Sinninghe Damsté.
09/1992-09/1995	M. Sc. in Chemistry; University of Nijmegen (KUN); Specialisation: Organic Chemistry.
09/1988-06/1992	B. Sc. in Chemistry; Advanced Laboratory Education (HLO); Sittard; Specialisation: Organic Chemistry.