Martijn Hagens (1971) has been a member of the Management Board and Chief Operation Officer (COO) of Vattenfall in the Netherlands since 2014. He joined Nuon in 2003 and has held various management roles at the company. Since 2009, he has also worked at Vattenfall AB. He has been a member of Vattenfall's Executive Group Management since 2015 and at present holds the position of Senior Vice-President, Customers & Solutions Vattenfall. Before working for Vattenfall, Martijn Hagens held a management position at Accenture. Martijn Hagens is a Dutch citizen.