Günter Verheugen (born 28 April 1944) is a German politician who served as European Commissioner for Enlargement from 1999 to 2004 and then as European Commissioner for Enterprise and Industry from 2004 to 2010. He was also one of five vice-presidents of the 27-member Barroso Commission (Barroso I). After his retirement he is now honorary Professor at the European University Viadrina in Frankfurt (Oder). Since 2015, has been leading the European integration work stream in the Agency for the Modernisation of Ukraine.