He is a member of the European Childhood Epilepsy Surgery Group U-TASK, of the European Network for Epilepsy Research ENER and of the European Reference Network for rare and complex epilepsies EpiCare. He is a member of the Consilium Neurologicum, responsible for the education of neurology residents in the Netherlands. He has received various educational awards and is a well-known speaker at congresses.
His research focuses on intractable focal epilepsy and epilepsy surgery. His team explored the clinical use of new advanced neuroimaging methods, clinical decision-making in focal epilepsy, quality-of-life and coping issues in intractable epilepsy, and new treatments. He is engaged in a national collaboration which led to the develop a device to detect seizures during the night (Nightwatch). Recent research focuses on networks in the intracranial EEG measured on the cortex. Together with the department of Applied Mathematics of Twente University, he is engaged in developing a neural mass computer model that can represent the epileptic cortex of individual patients.