Simplify the following text for a Grade 9 native English-speaking person.
Original: In 2006 , Nelsons became chief conductor of the Nordwestdeutsche Philharmonie of Herford , Germany , a post he held until the end of the 2008-2009 season .
Simplified: In 2006 , he became chief conductor of the Nordwestdeutsche Philharmonie of Herford , Germany , for three years .