At the San Francisco Conservatory of Music, Dr. Harris serves on the faculty of the Collegiate, Pre-College, and Continuing Education programs. In the collegiate division, he  developed the conservatory's first course on art songs by Black composers, and taught Basic Phonetics/Introduction to IPA. He also teaches private voice lessons, and performance workshops in vocal performance, and musical theatre  in the Continuing Education program and is a voice faculty member of the Pre-College Academy. 

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He previously served as a Soloist Intensive Voice Instructor for the award-winning Premier Ensemble with the San Francisco Girls Chorus. His additional teaching affiliations include the University of Nevada, Las Vegas (voice), West Valley College (hip-hop), Head-Royce School (voice and musical theater), Menlo School (voice and musical theater), P.A.L.S. at the Aspen Music Festival, and Convent & Stuart Hall (voice, musical theater, and general music).

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Phillip is a dedicated voice educator committed to developing strong vocal technique, expressive storytelling, and inclusive repertoire. A recognized researcher of classical songs by Black composers, he has presented lectures on that topic at the Peabody Institute of Johns Hopkins, Westminster Choir College, UC Santa Cruz, Alabama State University, San Francisco City College, and regional and local NATS conferences. He has also given masterclasses at Alabama State University, the University of Nebraska Omaha, the San Francisco Girls Chorus, and Los Medanos College. His students have performed leading roles on Broadway, earned top honors in the NATS (national, regional, and local) Competition, Schmidt Vocal Competition, American Protégé, and Junior Bach Festival competitions.  He has guided and prepared students to further vocal study at the University of Michigan, Oberlin Conservatory, UCLA, University of Southern California,  University of Texas at Austin, University of California, Irvine,  Interlochen, Boston University Tanglewood Institute,  MPulse Vocal Arts Institue at the University of Michigan, UCLA Summer Musical Theatre Program, San Francisco Conservatory of Music Summer Vocal Academy, Berklee Summer Musical Theatre Program, Stagedoor Manor, and Ruth Asawa San Francisco School of the Arts.

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Phillip holds degrees in voice performance from the University of Nevada, Las Vegas (Doctor of Musical Arts), the University of Michigan (Master of Music), and the University of California, Irvine (Bachelor of Music).