Claude Sim has been with the Colorado Symphony since 1999. He frequently performs as soloist with the orchestra. He previously held a principal position with the Baltimore Symphony, and has been guest Concertmaster of the Kansas City Symphony. Other affiliations include the National Arts Centre Orchestra and the Philadelphia Orchestra. As a chamber musician, Claude has concertized as guest first violinist of the critically acclaimed Miró String Quartet, and as violist with the Grammy award winning Pacifica Quartet.