 He also headed the department of Development and Security at the German Institute for Economic Research (DIW).Brück is an expert on the economics of developing and transition countries such as Colombia, Mozambique, Angola, Uganda, Mongolia and the countries of Central Asia.In September 2012 it was announced that he was to replace Bates Gill as head of the Stockholm International Peace Research Institute, a global think-tank dedicated to research into security, conflict and arms control.