Mezzo-soprano ADELAIDE SINCLAIR maintains a busy schedule in both operatic and concert venues, having appeared with New York City Opera, Seattle Opera, Santa Fe Opera, San Antonio Opera, Opera Theatre of St. Louis, Arizona Opera, Central City (Colorado) Opera Festival, and the Metropolitan Opera's Outreach program. She has been a featured soloist with the Los Angeles Philharmonic (at both the Music Center and Hollywood Bowl), New York Choral Ensemble, L.A. Master Chorale, Pacific Chorale, St. Louis Chamber Orchestra, California Philharmonic, and the Long Beach, Pacific, Utah, Seattle, Portland, St. Louis, and Chicago symphonies, singing under the batons of such luminaries as Shaw, Hillis, 
Abravanel, and Leonard Slatkin. For six seasons she also toured the U.S. with Opera a la Carte, a Gilbert & Sullivan repertory company. Essaying more than 30 roles and 50 concert works, recent seasons included Berthe for Opera San Jose’s Barber of Seville, Queen Jezebel in a staged Elijah at Carnegie Hall, Denver’s La Fille du Regiment’s Marquise, and covering roles at the Metropolitan Opera in Wagner’s Gotterdammerung and Die Walkure. Abroad, she was soloist for the mainland China premiere performances of Elijah. The mezzo can be heard on a variety of recordings, including as the Witch of Skye on Highlander: A Celtic Opera, guest soloist on 'Tis the Season with the Gay Men's Chorus of Los Angeles, creating the role of Jochabed for Stoddard’s Stone Tables, and in sacred works of Schubert and Mozart under the Con Brio label.
Miss Sinclair is on the summer voice faculties at both Idyllwild Arts Academy and SongFest, serves as judge for the Met Auditions, and was a panelist for the California Symphonies Conference. She replaced tenor Matthew Polenzani on the popular El Camino Recital series and has conducted master classes at Sonoma State and the University of Nebraska. Featured in Columbia Artists' community concerts, she is also heard frequently as a soloist at various Bach festivals in the West.