Simplify the following text for a Grade 6 native English-speaking person.
Original: He was the 2009 champion of the GP2 Series , and is a previous champion of both the Formula 3 Euro Series and A1 Grand Prix , as part of A1 Team Germany .
Simplified: He won the 2009 GP2 Series championship . He is a past champion in Formula Three Euroseries and the A1 Grand Prix , as part of A1 Team Germany .