Mezzo-soprano Roselin Osser…

praised by the Boston Musical Intelligencer as a “gorgeous, mellifluous mezzo. . .with vivid expression and engaging intensity," has established herself as a compelling and versatile performing artist. Roselin made her Boston Lyric Opera debut in 2023 as Hansel in their Artist Classroom Visits production of Hansel and Gretel, introducing the wonder of opera storytelling to hundreds of students in the Boston area at schools, libraries, and the Boston Children’s Museum. In May 2024, she made her Carnegie Hall debut as the alto soloist in Mozart’s Solemn Vespers with MidAmerica Productions.

Renowned for her comedic timing and whimsical character portrayals, Roselin has brought roles to life with what critics have called “the flamboyance of a mezzo Marx Brother.” Her opera credits include The Fox in The Little Prince with NEMPAC Opera Project, Angie in Pepito with Opera del West, The Astronomer in Jack and Jill and the Happening Hillwith Salt Marsh Opera, the title role in El Gato con Botas 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. Her dramatic prowess has also shone through in tempestuous roles like Sesto in La Clemenza di Titowith Opera del West and the title character in Handel’s Silla with the Cambridge Chamber Ensemble, where The New England Theater Geek remarked on her “wild eyes, swagger, and exquisite cheekbones” that dominate the stage.

As a passionate concert artist, Roselin has performed as an alto soloist in revered works such as Bach's Christmas Oratorio with the Concord Chorus, Magnificat with the Providence Singers, Mozart's Requiem with Masterworks Chorale at Harvard's Sanders Theater, and Handel's Messiah with the Mystic River Chorale and Orchestra. Her repertoire also includes Pergolesi’s Stabat Mater with the Easton Chamber Music Festival, Mendelssohn’s Elijah with both the Heritage Chorale and Pioneer Valley Symphony Orchestra, and Mozart’s Vesperae Solennes de Confessore with the Choral Art Society of the South Shore. Guest solo appearances have included performances with the Salem Philharmonic Orchestra, Waltham Philharmonic Orchestra, Encore Opera of Rhode Island, and The Bostonians. In a recent concert of Rossini’s Semiramide with the Freisinger Chamber Orchestra, The Boston Musical Intelligencer lauded her “artful phrasing and dulcet warmth.”

Roselin’s talents also extend to professional recordings, such as her debut on Rumbarroco and La Donna Musicale's album Latinas InFusion, where she performs an original arrangement of the 1945 hit "The Last Time I Saw You," with lyrics written by her grandmother, Edna Osser.

Beyond the stage, Roselin combines her artistry with a commitment to environmental sustainability. A two-time first-place winner in the Maine National Association of Teachers of Singing (NATS) Song Festival, she holds degrees in Mechanical Engineering and Building Technology from Tufts University and MIT. As a sustainability consultant, she merges her expertise in green building with her passion for the arts, often delivering humorous presentations that engage and educate. Notably, she recently performed a unique stand-up act combining green building topics with opera, showcasing her creativity and dedication to making a meaningful impact.