Professor Daniel Simmen, MD Lecturer in ENT, Head and Neck Surgery. Prof. Simmen studied medicine at the University of Zürich and also trained in ENT at the department in Zürich with Prof. Ugo Fisch as the director at that time. For many years Dr. Simmen was the head of the Rhinology and Facial Plastic Surgery Unit at the University Clinic in Zürich Switzerland. His main research interest and clinical focus was therefore the surgical management of chronic rhinosinusitis and transnasal skull base surgery. The second field of clinical interest was facial plastic surgery eg functional and aesthetic aspects in harmony. Over fifteen years now Prof. Simmen is one of the partners at the ORL-Zentrum at the Hirslanden Clinic in Zürich. He has organized and is running many instructional hands on courses in Zürich and throughout the world. He has published two leading textbooks on endoscopic sinus surgery (Thieme – Manual on Endoscopic Sinus and Skull Base Surgery) and many book chapters and peer-reviewed papers in the field of his expertise.