Praised by the Boston Musical Intelligencer as a “gorgeous, mellifluous mezzo. . .with vivid expression and engaging intensity," mezzo-soprano ROSELIN OSSER has established a reputation as a dynamic performing artist.

With the panache of a mezzo Marx Brother, Ms. Osser has particularly excelled in comic and whimsical opera roles including The Fox in The Little Prince with NEMPAC Opera Project, The Astronomer in Jack and Jill and the Happening Hill with Salt Marsh Opera, the title role in El gato con botas (the Spanish “Puss-in-Boots”) with OperaHub, Cherubino in Le nozze di Figaro with Manhattan Opera Studio, Pitti-Sing in The Mikado with Opera Providence, and Rosina in The Barber of Seville with Longwood Opera.  Among other audacious character portrayals, The New England Theater Geek recently described her as having the “wild eyes, swagger, and exquisite cheekbones of a villain [who] dominates the stage” for her performance as the title Roman dictator in Handel’s Silla with the Cambridge Chamber Ensemble.

An accomplished and passionate concert artist, recent seasons have included alto soloist debuts in Mozart's Requiem with the Masterworks Chorale in Sanders Theater at Harvard University, Handel's Messiah with the Mystic River Chorale and Orchestra, Pergolesi’s Stabat Mater with the Easton Chamber Music Festival, Mendelssohn’s Elijah with both the Heritage Chorale and the Pioneer Valley Symphony Orchestra, and Mozart's Vesperae Solennes de Confessore with the Choral Art Society of the South Shore. Other concert appearances include guest soloist with the Salem Philharmonic Orchestra, the Waltham Philharmonic Orchestra, Encore Opera of Rhode Island, The Bostonians with the University of New Hampshire Celebrity Series, and a celebration of Leonard Bernstein's Broadway hits with Temple Emanuel of Newton, Massachusetts.  The Boston Musical Intelligencer recently praised Ms. Osser's "artful phrasing and dulcet warmth" for a concert of florid excerpts from Rossini's Semiramide with the Freisinger Chamber Orchestra.  She made her professional recording debut on Rumbarroco and La Donna Musicale's recently released CD "Latinas InFusion" singing an original arrangement of the 1945 hit song "The Last Time I Saw You," made popular by Doris Day and Frank Sinatra, with music by Marjorie Goetschius and lyrics by Osser's own grandmother Edna Osser.

A two-time first place prizewinner in the Maine National Association of Teachers of Singing (NATS) Song Festival, Ms. Osser has combined her lifelong passion for performing arts with strong motivation to reduce human impact on the environment.  She earned degrees in Mechanical Engineering and Building Technology from Tufts University and the Massachusetts Institute of Technology (MIT) in parallel to her vocal studies, now balancing an unusual dual career as both a classical singer and an energy consultant for prominent New England green building projects. ​

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“A gorgeous, mellifluous mezzo, Osser is vocally well-rounded and capable of a wide range of timbres.”        
                                         - The Boston Musical Intelligencer

“[Osser] possesses a velvety voice that she wields with marvelous control.”  
                                                              - The Standard-Times

Personal Website


Rachel Portman:  as "The Fox" (The Little Prince)
Bellini:  Sgombra è la sacra selva (Norma)
Bernstein:  Somewhere (West Side Story)
Gounod:  Faites-lui mes aveux (Faust
Händel:  Hence, Iris, Hence Away (Semele)
Bizet:  Habanera (Carmen)
Rossini:  Ah quel giorno ognor rammento (Semiramide)
Mahler:  Wenn mein Schatz Hochzeit macht
(Songs of a Wayfarer)