Karen Heymann is a versatile performer with a keen interest in new music. Chamber operas she has premiered include Kento Iwasaki's Beloved Prey at The Secret Theatre in Long Island City and George Lam's Heartbreak Express with Rhymes With Opera. Other collaborations with Rhymes With Opera include premieres of chamber works during two summers of their Pocket Opera Workshop. Karen has also premiered excerpts from a chamber musical adaptation of The Yellow Wallpaper by Sarah Taylor Ellis at 54 Below. She sang with Choral Chameleon in the sole live performance of Caroline Polachek's Drawing the Target Around the Arrow at National Sawdust.

Karen is also an active choral singer with a love of early polyphony and chant. She is currently engaged as an alto with the Schola Cantorum of the Church of St. Vincent Ferrer, a professional choral ensemble in New York City. She is also a regular cantor at St. Vincent Ferrer and St. Catherine of Siena, and has subbed frequently with the Trinity Wall Street Chapel Choir, Broadway United Church of Christ, Congregation B'nai Jeshurun in Short Hills, and Temple Beth Abraham in Tarrytown.

Operatic roles performed include Miss Todd in The Old Maid and the Thief, Orlofsky in Die Fledermaus, Lisetta in Haydn’s Il mondo della luna, and Madama Rosa in Donizetti's Il campanello di notte. Karen has performed with Piedmont Opera, Greensboro Opera, Capitol Opera Raleigh, and the Magnolia Baroque Festival.

Karen holds a Master of Music in Voice Performance from the University of North Carolina at Greensboro, and a Bachelor of Music in Voice Performance from the University of North Carolina School of the Arts.