Complex sentence: Brett Mitchell (born July 2,1979) is an American conductor, who is currently Assistant Conductor of the Houston Symphony, and was the Assistant Conductor of the Orchestre National de France from 2006 to 2009.
Split into simpler sentences: Brett Mitchell (born July 2,1979) is an American conductor, who is currently Assistant Conductor of the Houston Symphony. He was the Assistant Conductor of the Orchestre National de France from 2006 to 2009.