- Chairman of Department of Neurosurgery. Donostia University Hospital. San Sebastian. Spain.
- Past President of the Spanish Society of Neurosurgery
- Spanish Delegate to Latin American Federation of Neurosurgery
- Member and Spanish Delegate of MASSIN Society.
- Member of the European Neurosurgical and Skull Base Societies.
- International Active Member of the American Association of Neurological Surgeons (AANS) and Congress of neurosurgeons (CNS)
- Honorary Member of the Colombian Association of Neurosurgery
- Member of the New York Academy of Sciences.
- Member of the World Federation of Neurosurgical Societies
- President of the Organizing Committee of the 7th Congress of the Spanish Society of the Spanish Skull Base Society 2006
- President of the Organizing Committee of the 18th Congress of the Spanish Society of Neurosurgery 2013 Joint meeting with German Academy of Neurosurgery
- President of the Organizing Committee of the 16th Congress of the Spanish Society of Neurorraquis 2016
- Professor of Neurosurgery.
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