Oliver has been a Consultant Colorectal and General Surgeon at Oxford University Hospitals NHS Foundation Trust since 2009 and Clinical Director for Surgery since April 2018. He undertook junior doctor training in Oxford, Glasgow, Cambridge and London, including St Marks Hospital. He undertook registrar training in the Wessex region before completing his training at the Royal Brisbane Hospital in Australia. For his Doctorate of Medicine thesis, he studied the pharmacology of pelvic floor dysfunction. He has published two books and over a hundred journal articles and book chapters. His main clinical interests are minimally invasive surgery, complex pelvic floor problems and endometriosis.