CLINICAL PROFESSOR AND CHAIRMAN OF OTOLARYNGOLOGY AND HEAD & NECK SURGERY,  SCHOOL OF MEDICINE - FEDERAL UNIVERSITY OF RIO GRANDE DO SUL

HEAD OF THE OTORHINOLARYNGOLOGY AND HEAD AND NECK SURGERY SERVICE. HOSPITAL DE CLÍNICAS DE PORTO ALEGRE - BRAZIL

FORMER PRESIDENT OF THE BRAZILIAN ASSOCIATION OF OTORHINOLARYNGOLOGY AND CERVICO-FACIAL SURGERY

FORMER PRESIDENT OF THE BRAZILIAN SOCIETY OF OTOLOGY

PAST CHAIRMAN INTERNATIONAL ADVISORY BOARD - AMERICAN ACADEMY OF OTORHINOLARYNGOLOGY

PERMANENT MEMBER OF THE COLLEGIUM OTO-RHINO-LARYNGOLOGICUM AMICITIAE SACRUM