After completing specialist training in 1998, Christian Sittel held positions at the universities of Cologne, Homburg and Heidelberg. In 2008 he was appointed chairman at the department of Otorhinolaryngology/Head and Neck Surgery in Stuttgart. His main fields of expertise are laryngology and airway in adults and children. He was founding president of the European Laryngological Society (ELS) working committee on neurolaryngology. He is board member and president-elect of the ELS as well as board member of the European Society of Pediatric Otorhinolaryngology (ESPO). Together with Orlando Guntinas Lichius he headed the  Neurolaryngology Clinic at Cologne University between 1994 and 2001.

Orlando Guntinas-Lichius completed his specialist training in otorhinolaryngology at the University of Cologne.  Since 2006 he has been a professor of otorhinolaryngology and head of the Department of Otorhinolaryngology, Jena University Hospital, Jena, Germany. Neurolaryngology playsan important role in his daily clinical work and is one of his main research interests. He is the current chairperson of the European Laryngological Society Committee on Neurolaryngology.