Chair of the Institute of Mechanics at Universität Duisburg-Essen

Head of the working group on ice sheet modelling at the Alfred Wegener Institute and professor at the University of Bremen.

Director of the Institute for Structural Analysis at Technische Universität Dresden.

Professor Emeritus at Ecole Polytechnique Fédérale de Lausanne and at the Politecnico di Milano

Professor at the Department of Mathematics, University of Wisconsin-Madison

Chair and Head of Medicine at the University of Cape Town and Groote Schuur Hospital