Since 2007 Professor and Chair of the Department of Radiation Oncology, University Medical Center Freiburg, Germany; 2006-2007 Harvard Medical School, Massachusetts General Hospital, Department of RadiationOncology, Proton Therapy Center, Boston, USA; 2000 - 2006 Assistant Medical Director, Department of Radiation Oncology, Rechts der Isar Hospital, Technical University, Munich, Germany ; 2003 Postdoctoral lecture qualification, Department of Radiation Oncology, Rechts der Isar Hospital, Technical University, Munich, Germany; 2000 Board Certification Radiation Oncology