Phyllis E. Griffin is a Professor Emerita, Certified Feldenkrais Practitioner®, and Certified Lessac Teacher. Throughout her distinguished career, she studied with prominent vocal theorists and practitioners, including Richard Armstrong of the Roy Hart Theatre Method, Patsy Rodenburg, Catherine Fitzmaurice, Dudley Knight, and Kristin Linklater.

Professor Griffin served as a vocal coach for The Goodman Theatre, assisting on Gem of the Ocean, Drowning Crow, King Hedley II, Blues for an Alabama Sky, and I Am A Man. Her extensive professional credits also include serving as the vocal coach for Shakespeare on the Green's production of Othello and working with Disney Productions to coach prospective actors for The Lion King. Additionally, she was the dialect coach for Joan Plowright on the feature film Dennis the Menace, provided vocal instruction to private business leaders, and narrated documentaries for PBS and NPR.

During her tenure as a voice and speech professor, Phyllis directed numerous productions for The Theatre School, including Two Trains Running; Insurrection: Holding History; Flyin' West; Stamping, Shouting and Singing Home; Sleep Deprivation Chamber; For Colored Girls Who Have Considered Suicide/When the Rainbow Is Enuf; and Curse of the Starving Class.