Phillip has performed works by Jacqueline Hairston at Carnegie Hall's Stern Auditorium and Lincoln Center's Bruno Walter Auditorium. Concert appearances include Deck the Halls with the San Francisco Symphony and San Francisco Boys Chorus at Davies Symphony Hall, Let Us Break Bread Together with the Oakland Symphony and Oakland Symphony Chorus at the Paramount Theatre, Liberty for All at the Aspen Music Festival, and Trouble in Tahiti with the Reno Chamber Orchestra.

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His operatic and musical theatre credits include Sem (Noye's Fludde) with Opera Las Vegas, Marius (Les Misérables) with the San Mateo Masterworks Chorale and Orchestra, Cinderella's Prince (Into the Woods) and King Arthur in Camelot, both with Mountain Play, and Mr. Dashwood (Little Women) with Island City Opera. With Pocket Opera, he has performed Schaunard in La Bohème, Cascada in The Merry Widow, and Papageno in the award-winning animated production of  The Magic Flute, featuring an all-Black cast and creative team. Other notable roles include the title role in Don Giovanni,  Orphée (Les Malheurs d'Orphée), Dr. Falke (Die Fledermaus), Marcello (La Bohème), The Learned Judge (Trial by Jury), The Pirate King (The Pirates of Penzance), Marquis de la Force (Dialogues des Carmélites), Fauteuil/Arbre (L'enfant et les Sortilèges), Bob (The Old Maid and the Thief ),  Junius (The Rape of Lucretia), and  Fiorello  (Il barbiere di Siviglia). 

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A recipient of the Encouragement Award from the Metropolitan Opera National Council Auditions, Phillip has participated in the Aspen Music Festival, Hawaii Performing Arts Festival, and Opera in the Ozarks. He also spent two seasons in the San Francisco Opera extra chorus in productions of Götterdämmerung and Billy Budd.

His oratorio appearances include the baritone solo in Duruflé's Requiem and bass solos in Beethoven's Choral Fantasy and Handel's Messiah. As a recitalist, he has performed at the University of California, Irvine, Alabama State University, Los Medanos College, Downs Memorial United Methodist Church, and San Francisco's Presidio Chapel. His performance of Jacqueline Hairston's Songs of Concealment with Pocket Opera's PocketWatch was nominated for Best Vocal Solo/Recital Performance by the San Francisco Classical Voice Audience Choice Awards.

As Vice President of the African-American Art Song Alliance Conference Board, Phillip is a frequent performer of works by Black composers and has presented new works works by  H. Leslie Adams, Maria Thompson Corley, DelShawn Taylor, and Marques L.A. Garrett. 

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Recordings include Phillip Harris in Recital with Damien Sneed, an original EP, In My Philz, produced by Marcus McCauley, and a featured appearance singing "Gallery" from Deon Nielsen Price's Concert from Presidio Chapel. Recent performances as a choirster include Elaine Hagenberg's Illuminare at Carnegie Hall with MidAmerica Productions and with West Edge Opera in Dolores (World Premiere), David et Jonathas, and Wozzeck. This summer, he returns to West Edge Opera as Willie McDonald in American Apollo and will perform at The Links, Incorporated National Assembly in Detroit.