Ariadne Greif, praised for her “elastic and round high notes” (classiqueinfo), made her major orchestral debut in April singing Witold Lutoslawski's Chantefleurs et Chantefables with the American Symphony Orchestra. In the 2009-2010 season, she starred as the title role in Ravel's L'enfant et les sortileges, the title role in Rusalka, Ivona in Jeff Meyer’s The Hunger Art, Lucy in Menotti’s The Telephone, Sandmann in a concert version of Hänsel und Gretel, Phaedra in Christopher Park's new opera, Phaedra and Hippolytus, and the only female role, Madeline, in Debussy's unfinished opera La Chûte de la Maison Usher with the Opéra Français de New York. Other projects in the spring included a shared recital of Barber's complete vocal works at the Bruno Walter Auditorium at Lincoln Center; a shared recital of unaccompanied music with the avant garde’s veteran champion, cellist Madeline Shapiro; a recital of Dadaist 20th century music; and a world premiere as Galileo in a piece by Erol Gurol for eight cellos, soprano, and choir to the heretical text of Galileo’s Starry Messenger.

An avid champion of new music, in the 2008-2009 season she made her Zankel Hall debut as part of the Upshaw-Golijov “Composing Song” Professional Training Workshop of The Weill Music Institute at Carnegie Hall, premiering pieces written for her by Elena Langer; gave the world premiere of Aaron Dai's Con Furia with the Chelsea Symphony; made her Fisher Center debut singing Ainu Dreams, new orchestral songs by Greg Armbruster; won the Bard Conservatory Concerto Competition singing Witold Lutoslawski's Chantefleurs et Chantefables; and premiered The Door, by Ryan Chase, with the Mannes Orchestra.  Ariadne founded Uncommon Temperament, a Manhattan-based baroque ensemble, with whom she has toured to Detroit, created a traveling production of Bach's Coffee Cantata, thrown a birthday party for Telemann, and made her Poisson Rouge debut, hailed as “…accomplished and winning…” by the NY Times.  A California native, in her early career as a "boy soprano," she toured internationally with the Los Angeles Childrens Chorus, performed as "Sem" in Britten's Noye's Fludde, and, among other things, sang in the premiere of Tobias Picker's Fantastic Mr. Fox at the Los Angeles Opera under the baton of Peter Ash.