Dr Nirmalananthan is a consultant neurologist at St George's University Hospitals NHS Foundation Trust and honorary senior lecturer at St George's University of London.

Dr Nirmalananthan graduated in Natural Sciences from Cambridge University before studying Medicine at King’s College London. He was awarded a PhD in Neuroscience from the Institute of Neurology, University College London before undertaking higher specialist training in neurology at St George’s Hospital and the National Hospital for Neurology and Neurosurgery in London.

Dr Nirmalananthan is clinical lead for the neuromuscular service and the headache service at St George's. He also co-chairs the South West London and Surrey Neurosciences Network. He was clinical lead for Neurology & Neurophysiology at St George's from 2016-2019 and clinical director of the Atkinson Morley Regional Neurosciences Centre at St George's Hospital from 2019-2023.

Dr Nirmalananthan is also currently national clinical director for Neurology at NHS England.