I am a professor of Observational Cosmology at the Ruhr-University Bochum. My main field of research is the weak gravitational lensing effect that is used to make dark matter structures visible. By analysing large imaging surveys of the sky we study the evolution of the Universe on the largest scales and gain unique insights into cosmological physics.

My research is supported by the European Research Council (ERC) and the Deutsche Forschungsgemeinschaft.

Together with Prof. Catherine Heymans (University of Edinburgh; guest professor in Bochum) I have founded the German Centre for Cosmological Lensing (GCCL), a research network of German institutes studying weak and strong gravitational lensing for cosmological applications.