After completing higher specialist training in Oxford, Dr.Sivarajan works as a Consultant Stroke Physician at Apollo Hospitals and also is a honorary consultant at Oxford University hospitals looking after patients with Stroke, Parkinson Disease, Dementia, complex geriatric conditions. He has extensive experience in complex neurological rehabilitation and offers Botox service for patients with spasticity, dystonia and movement disorders. He is affliate member of British Association for the Study of Headache(BASH) and treats complex headaches including migraine, cluster headache, tension headache etc. His passion is to transform hyperacute stroke care and neuro rehab services in India. He is involved in Neuroimaging based Stroke research at the University of Oxford in early diagnosis and efficient treatment selection in stroke.