George Samandouras trained in Neurosurgery in Oxford receiving numerous teaching awards from the University of Oxford before becoming Consultant Neurosurgeon in November 2009 at the National Hospital for Neurology and Neurosurgery, Queen Square, the world's first institution specializing in brain pathologies. He runs a neuro-oncology service with high volume awake craniotomies and resection of gliomas in eloquent parts of the brain. He is invited annually to present his work to the American Association of Neurological Surgeons (AANS), Congress of Neurological Surgeons (CNS) and other international societies. He is an invited member of the Executive Committee of the AANS/CNS joint section on tumours (2016-2020). His bestselling book "The Neurosurgeon's Handbook", Oxford University Press, has been translated to Chinese in 2015.

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Professor Ribas runs a research laboratory at the Hospital Beneficência Portuguesa, focusing on microneurosurgical anatomy and on cranial neurosurgical techniques; he has published more than 50 articles and 40 book chapters. He is a pioneer of stereoscopic publications in neurosurgical journals (Journal of Neurosurgery, December 2001, with its cover illustration), and his lectures are mostly done with 3D techniques since 1995. In 2010 his article The Cerebral Sulci and Gyri was the most accessed article of the whole Journal of Neurosurgery Publishing Group. He is a member of the editorial staff of the Neurosurgical Focus,  Journal of Neurosurgery Video Supplement and reviewer for Neurosurgery,  and World Neurosurgery.