Complex sentence: Since 1968, Zeitlin has been on the teaching faculty at the University of California, San Francisco, where he is clinical professor of psychiatry and in private private practice in San Francisco and Marin County.
Split into simpler sentences: Since 1968, Zeitlin has been on the teaching faculty at the University of California, San Francisco, where he is clinical professor of psychiatry. He has a private practice in San Francisco and Marin County.