Since 2015 he has been a Consultant Oncological Neurosurgeon at the famous John Radcliffe Hospital in Oxford. His work is strictly focused in brain tumour surgery and he undertakes complex operations including awake surgery for resection of tumours located in inaccessible parts of the brain. Dr Apostolopoulos has performed more than a 1000 brain tumour operations, has enormous experience in awake surgery and he is amongst the surgeons with the highest number of awake operations/year in the UK.