Sean Martinfield has been connected to HuffingPost.com since 2012. Prior to that he was the Entertainment Editor for SanFranciscoSentinel.com. Sean interviews the international artists who appear with San Francisco Opera, SF Symphony, and SF Ballet. He also interviews classical recording artists, including vocalists and instrumentalists. As a private vocal coach, Sean has worked with San Francisco Bay Area performers since 1983 and published thousands of responses to career questions on AllExperts.com. He is a native San Franciscan, a Theatre Arts graduate from San Francisco State University and with graduate work at Berkeley's Pacific School of Religion. Sean's 20-year singing career, as a baritone-turned-tenor, ranged from churches to concerts to cabarets.