Warren earned a BA and teaching credentials in music from the University of Washington where he studied trumpet with Roy Cummings. He has performed professionally in a variety of orchestras, theaters, chamber and folk ensembles, and taught music in schools and privately. He has served as Secretary-Treasurer of Local 76-493 since 2003. As elected officer, Warren has been a delegate to the Northwest Conference of Musicians, the Western Conference of Locals of the AFM and the AFM Convention where he has served multiple times on the Election Committee. Warren has also served for two terms as Trustee of the Martin Luther King Junior County Labor Council.