|Date of Birth|
|Place of Birth||Schwäbisch Hall, Germany|
Before working for UNMIK, Rücker had served as the Commissioner for Finance and Head of the Budget and Finance Division at the Federal Foreign Office in Berlin and held various postings in the Federal Foreign Office in Bonn and German embassies abroad, including Dar es Salaam, Detroit (Consulate-General) and Vienna. He was also the Ambassador and Deputy High Representative for Administration and Finance in the Office of the High Representative in Sarajevo and the Mayor of the city of Sindelfingen, Germany.
Rücker has a doctoral degree in international economics and has previously served as a foreign policy adviser to the Social Democratic parliamentary group in the German Bundestag.