Dietmar Nietan (born 1964), Member of Parliament, Treasurer of the Social Democratic Party of Germany since 2014. He was a member of the German Bundestag from 1998 to 2005 and again since 2009, last re-elected in 2021. He represents the interests of the people from the district of Düren (North Rhine-Westphalia). He is a member of the Committee on Foreign Affairs and a substitute member of the Committee on Education, Research and Technology Assesment as well as the Committee on Climate Action and Energy. His political focus includes foreign policy (Central Eastern Europe, Eastern Europe, Western Balkans, Israel). Since 2022, he has held the office of Coordinator for German-Polish cooperation (Federal Foreign Office).