Since July1st 2014 Dietmar Köster is a Member of the European Parliament and there a member of the S&D Group. During the election campaign in 2014 Köster campaigned with the slogan "For a Europe of social competence and economic rationality" for a policy change in Europe. Köster is a member of the Committee on Legal Affairs and a substitute member of the Committee on Culture and Education. His current parliamentary work focuses on the issues "Copyright in the digital age" and the Free Trade Agreements CETA and TTIP. Before being elected as a Member of the European Parliament, he was a professor of sociology at the University of Applied Sciences Dortmund with a research focus on Geragogik (Age Education).