William E. B. Siart joined the board in November 2005 and became a vice chair in July 2006. He is the chairman of the board of Excellent Education Development (ExED), a nonprofit corporation that develops and provides management services to charter public schools. Siart is the former chairman and CEO of First Interstate Bancorp. He is also chairman of the board of Walt Disney Concert Hall, Inc.; a member of the board of directors of the Los Angeles Philharmonic Association and the Music Center Foundation; a member of the board of trustees and chairman of the finance committee of the University of Southern California; and a member of the board and chairman of the audit committee of the California Community Foundation. A native of Los Angeles, Siart earned a B.S. in economics from Santa Clara University and an M.B.A in finance from the University of California, Berkeley.