Simplify the following text for a Grade 7 native English-speaking person.
Original: He previously served as senator of finance for the State of Berlin from January 2002 until April 2009 , when he was appointed to his position at Bundesbank .
Simplified: In 2002 , he became the senator for finance in the German state of Berlin . In May 2009 , he became member of the executive board of the Deutsche Bundesbank .