1985–1990
ORL, Head and Neck Surgery, university clinics in Erlangen.

1990–1995
Assistant Professor in Erlangen.

1995–2000
Head and Director, Department of ORL, Head and Neck Surgery, Saarland University in Homburg/Saar.

Since 2000
Head and Director, Department of ORL, Head and Neck Surgery University Clinics in Erlangen.

Since 2009
Honorary member of the Greek Society of ORL Head and Neck Surgery.

Since 2009
Director of Clinical Affairs, University Hospital Erlangen.

2012–2013
President of the German Society of ORL Head and Neck Surgery.

More than 300 articles in Medline, several books and book chapters. Special interest in salivary glands and head and neck cancer and ultrasound. Basic investigations and first ESWL of salivary stones worldwide, salivary gland endoscopy.