Christian Stegmann, born in 1965, was professor at the University of Erlangen-Nürnberg. The astroparticle physicist works at the H.E.S.S. experiment (High Energy Spectroscopic System), a system of Cherenkov detectors in Namibia. This instrument allows scientists to explore cosmic showers of ultra-high energy gamma particles. From 1 October 2011 he is a member of the DESY Board of Directors and represents the DESY Board of Directors in Zeuthen.