Koos Timmermans started his career with ING in 1996. He was a member of the Executive Board of ING Group and chief risk officer from 24 April 2007 until 1 October 2011. He was appointed vice-chairman of the Management Board Banking as of 1 October 2011. From 1 October 2014, Koos Timmermans has, in addition to his current tasks, which include aligning ING Bank's activities and balance sheet with new and upcoming regulation, also assumed responsibilities for ING Bank's operations in the Benelux, ING's Sustainability department, advanced analytics as well as ING’s research activities.