Executive Board

The Executive Board of CoMeT

Markus Hess, MD, PhD, President

Markus Hess, MD, is a dedicated otolaryngologist and phoniatrician, subspecializing in laryngology, phonosurgery, and disorders of professional voice users.

He is co-founder and Head of the first Voice Clinic in Germany (Deutsche Stimmklinik, 2014).He accepted 1998 a position as full professor at the University Medical Center Hamburg-Eppendorf and Professor of Phoniatrics.
Dr. Hess graduated from University Medical School, Düsseldorf, and Freie Universität, Berlin, and is a fellowship trained, board-certified Otolaryngologist and board-certified Phoniatrist. He trained as a HEISENBERG PhD fellow from the German Research Council (DFG) at HARVARD medical school and lectured thereafter for many years as active member and visiting lecturer within the HARVARD – M.I.T. health science and technology program. He is a leading physician-scientist in the area of research of basic voice physiology, vocal fold vibration analysis and voice disorders. He now specializes in the care of the performing voice and the treatment of voice disorders.

Dr. Hess has long-standing experience in performing the full spectrum of endoscopic and open surgical procedures on the larynx. He has invented many improvements for diagnostics and operative techniques in laryngology and holds a patent on LED-stroboscopy. Dr. Hess brings a multidisciplinary approach to such patients as public speakers, singers, and actors. His surgical patients receive cutting-edge minimally invasive techniques in laryngeal microsurgery as well as office-based voice surgery in topical anesthesia. Dr. Hess has authored or co-authored over hundred peer-reviewed articles in professional journals, book chapters, and textbooks.

He is now Chairman of the Pan European Conferences (PEVOC), founding member of the “German Society of Phonosurgery”, founder and Executive Board member of the European Academy of Voice (EAV), and became President of the international Collegium Medicorum Theatri (CoMeT). He serves in multiple capacities on many international editorial and scientific boards and committees. Dr. Hess teaches regularly at national and international voice conferences and gives own courses in cutting-edge phonosurgery techniques..


Eugenia Chavez de Bartelt, MD, Secretary General

Dr. Chavez de Bartelt is an ENT doctor and phoniatrist working in a private practice in Mexiko city. She specialized in indirect transoral phonosurgery and occupational voice disorders. Furthermore, she is specialist on allergies and influence of pollution on artist’s voices.

Peter Hulin, MD, Treasurer

Dr. Peter Hulin is an ENT doctor and phoniatrist working in a private practice in Munich. He specialized in diagnosis and treatment of professional voice users and performs interventions like Botulinumtoxin injections in patients with spasmodic dysphonia.

Ofer Amir, PhD, Membership Secretary

Dr. Ofer Amir is a speech language pathologist working at a hospital in Tel Aviv. He specialized on voice disorders and is now partially employed as professor at a local university, where he is teaching and researching.


Philippe H. DeJonckere, MD, PhD, Past-President

Philippe H. DeJonckere, M.D., Ph.D. is ENT-physician/Phoniatrician, certified specialist in Occupational Medicine, Rehabilitation Medicine and Forensic Medicine.

He is emeritus professor at the Utrecht University and honorary guest professor at the universities of Leuven and Lille. Currently he is General Coordinator of the Scientific Council at the Federal Institute for Occupational Diseases in Brussels. He is Past President of the CoMeT, chairs the Committees on Phoniatrics of the European Laryngological Society and is a member of the Voice Committee of the IALP and of the Advisory Committee of the PEVoC. The Dutch Society of Logopedics and Phoniatrics, the Austrian Voice Institute and the Union of European Phoniatricians have made him “Member of Honour”.

He authored 7 books,172 articles in international peer-reviewed journals and 72 chapters in books. He is Hon.Lt.-Colonel of the Belgian Army and has been decorated Commander of the Order of King Leopold II.