While there, he studied voice with Laura Miller at Juilliard and vocal coaching under Sam Morganstein with the Metropolitan Opera House.
His Off-Broadway work included The Connection, Dark of the Moon, The Apple, Capitol Cakewalk, The Boys In the Basement and Jen Genet's The Blacks.
Parker appeared in a number of films, including: Malcolm X, Nothing But a Man,[7][8][9] Sweet Love Bitter, Stiletto, Last of the Red Hot Lovers,[10] Inside Harlem, Clockers, Ghost Busters II, Proudly We Served, and The Devil and Daniel Webster.
His television credits include: Naked City, The Defenders, Armstrong Circle, Theater, The Doctors and The Nurses, As The World Turns, N.Y.P.D.
Parker worked extensively with The Yale Repertory Theater and was featured in a number of regional theater productions including: Joe Turner's Come and Gone, Two Trains Running, A Child's Tale, Planet Fire, Cry The Beloved Country, Promises, Promises, Carmen Jones, Tale of The Soldiers, The Emperor, Jones, Gabriel, and Free and Easy.