Complex sentence: Bell attended Stanford University and Columbia University (where he was a student of Cassius Jackson Keyser) and was on the faculty first at the University of Washington and later at the California Institute of Technology.
Split into simpler sentences: Bell attended Stanford University, the University of Washington, and Columbia University (where he was a student of Cassius Jackson Keyser). He was on the faculty first at the University of Washington and later at the California Institute of Technology.