In 2008 he became junior research group leader at the Mathematics Center of the University of Heidelberg, where he habilitated in 2011 (Evidence for the section conjecture in the theory of arithmetic fundamental groups).
2008 wurde er Nachwuchsgruppenleiter am Mathematics Center der Universität Heidelberg, an der er sich 2011 habilitierte (Evidence for the section conjecture in the theory of arithmetic fundamental groups).