 He has also appeared with orchestras in Israel, Hong Kong, Japan, Australia, New Zealand and South America, and summer festivals worldwide.In North America, St.Clair has led the Boston Symphony Orchestra, (where he served as assistant conductor for several years), New York Philharmonic, Philadelphia Orchestra, Los Angeles Philharmonic and the San Francisco, Seattle, Detroit, Atlanta, Houston, Indianapolis, Montreal, Toronto and Vancouver symphonies, among many.A strong advocate of music education for all ages, St.Clair has been essential to the creation and implementation of the Symphony's education programs including Pacific Symphony Youth Ensembles, Sunday Connections, OC Can You Play With Us, arts-X-press and Class Act.