Hillarie O'Toole is equally at home in both opera and musical comedy. Ms. O'Toole's recent roles include Sarah Brown in Commonwealth Opera's production of Guys and Dolls and Amy in BASOTI's San Francisco premiere of Little Women. She is a past recipient of the Mikanna Clark Taurmann scholarship for voice from the international music fraternity Mu Phi Epsilon. Other roles she has performed include Papagena in Die Zauberflöte, Polly Peachum in The Threepenny Opera, Madame Heart in Der Schauspieldirektor, Eileen in Wonderful Town, Fiona in Brigadoon, and My Fair Lady's Eliza Doolittle. In 2004, she premiered the role of Esther in The Captivation of Eunice Williams with Old Deerfield Productions, appeared with the production's Canadian premiere in 2005, and again with the 2006 Smithsonian Institute production in Washington, DC.

Ms. O'Toole has been a featured soloist in concerts with the Keene Chorale, Clark University, Northampton Academy of Music, and Commonwealth Opera. She holds a Master's degree in Music Performance from Syracuse University. Her studies also brought her to the American Institute of Musical Studies in Graz, Austria. She currently resides in South Hadley, Massachusetts where she is the Music Instruction Coordinator of the Berkshire Hills Music Academy, a post-graduate school for gifted musicians with cognitive and learning disabilities, and additionally serves on the voice faculty of the Northampton Community Music Center.