Supervisor surgeon for cochlear implantation in University Clinical Center Tuzla. Tuzla, Bosnia Herzegovina.

Medical Faculty, Department of Otolaryngology, Division of Otology and Neurotology Antwerp / Belgium

Oticon Medical Scientific Center  Copenhagen Denmark

ICLO Teaching Center New Endoscopic Approaches to Lateral Skull Base, Inner Ear and Cerebello-Pontine Angle, Verona Italy

World Hearing Center, Institute of Physiology and Pathology of Hearing, Warsaw,Poland

Cochlear Science and Research Center Berlin Germany.

Hannover Medical School, Clinic for Laryngology, Rhinology and Otology, Hannover, Germany,

Academy of Hearing Aid Acoustics, Lübeck-Germany.

Supervisor surgeon in University Clinical Center Tuzla. Tuzla, Bosnia Herzegovina.

Cochlear implant Center Medel Company Innsburck, Austria.

Sialoendoscopy Program at European Sialendoscopy Training Center, Geneva, Switzerland.

Otological Microsurgery with emphasis on minimally invasive techniques program. Insel Hospital, ENT and HNS Department, Bern, Switzerland.

Supervisor surgeon in University Clinical Center Tuzla. Tuzla, Bosnia Herzegovina.

University clinic of ORL, Head and Neck Surgery, Bern, Switzerland

University clinic of ORL, Head and Neck Surgery, klinikum der Universitat, Munchen, Germany.

Würzburg University, Faculty of Medicine, Department of Otolaryngology, Division of Otology and Neurotology, Wüzburg, Germany

Medical Faculty, Department of Otolaryngology, Division of Otology and Neurotology, Parma / Placenza, Italy.

Klinikum der Universitat München for Laryngology, Rhinology and Otology, Munich, Germany,

The Ohio State University, Medical Faculty, Department of Otolaryngology, Division of Otology and Neurotology. OH, Columbus, USA.