Josemir W. Sander, also known as Ley Sander, is the ES Professor of Neurology and Clinical Epilepsy at the Department of Clinical and Experimental Epilepsy, Institute of Neurology of University College London. He is Honorary Consultant Neurologist and Clinical Lead for Epilepsy at the National Hospital for Neurology and Neurosurgery, Queen Square, London and at the Epilepsy Society's Sir William Gowers Assessment Centre in Buckinghamshire. Sander is Head of the World Health Organization Collaborating Centre for Research and Training in Neurosciences, London and Medical Director of the Epilepsy Society, based at the Chalfont Centre for Epilepsy. Sander is also the Director for Scientific Research at SEIN – in Heemstede.