Described as "bright" and "stylish" by Opera News, American soprano Sarah Fleiss is currently pursuing her Master's degree at the Curtis Institute of Music. This season, Sarah sings Susanna in Mozart's Le Nozze di Figaro at Curtis with conductor Nicholas McGegan and director Marcus Shields. She also brings a recital of Folk Music to Washington Performing Arts in Washington, D.C. and Artist Series Concerts of Sarasota in Sarasota, Florida with pianist Delvan Lin and looks forward to making her debuts with Tempesta di Mare, Hudson Baroque, and with the Dalton Chorale singing the Brahms Requiem. This fall, she sang Blanche in the duet from Dialogues of the Carmelites for an opera scenes program and joined J'nai Bridges for her residency recital in Field Hall at Curtis and at the Greene Space in NYC. For her master's project, she is planning a lecture recital based on the life and performances of Anna Moffo, famed Curtis alumna. This summer, she will attend the Georg Solti Bel Canto Accademia in Tuscany and joins Le Jardin des Voix with Les Arts Florissants under William Christie and Paul Agnew. She will travel internationally with the group over 2025, 2026, and 2027 singing in Les arts florissants and La Descente d'Orphée aux Enfers by M.A. Charpentier conducted by William Christie and Il giardino di rose by Scarlatti conducted by Paul Agnew.

In the 2023/24 she sang the Vixen in Janáček's The Cunning Little Vixen, in Handel's L'Allegro, il Penseroso ed il Moderato with the Curtis Opera Theater and in the final trio of Der Rosenkavalier under the baton of Yannick Nézet-Séguin with the Curtis Symphony Orchestra. She made exciting debuts with the Dolce Suono Ensemble, as the soprano soloist in the Fauré Requiem with the Cleveland Orchestra Youth Orchestra and in Poulenc's Gloria and Dvořák's Te Deum with the Wichita Symphony Orchestra. She also sang in the Ned Rorem Memorial Concert at Curtis and brought a recital to Core Memory Music in Rhode Island and to Young Musicians Musicale in Philadelphia. Over the summer, she travelled to the Aspen Music Festival as a Renée Fleming Artist, covering Susanna in Le Nozze di Figaro and singing in a baroque concert with conductor Nicholas McGegan.​

Over the 2022/23 season, she sang Ginevra in Handel’s Ariodante under the baton of David Stern and with the Tempesta di Mare orchestra. She travelled to Houston for HGO YAVA and to Switzerland to attend the Atelier Lyrique at the Verbier Festival where she worked closely with pianist James Baillieu and participated in masterclasses with Lise Davidsen, Thomas Hampson, Véronique Gens and James Garnon. She also went on tour with Eric Owens and members of the Curtis Opera Theater, singing the Brahms Neue Liebeslieder Op. 65. Along with Curtis Ensemble 20/21, she premiered In the Fields, a song cycle written by Pulitzer Prize-winning composer Tania León and performed in a recital along with Warren Jones. She has also sung in masterclasses with Barbara Hannigan, Peter Sellars, Renée Fleming, Sonia Prina, Dolora Zajick, Golda Schultz, Christine Goerke, Matt Aucoin, George Jackson, and Julia Bullock.​

Sarah was named the 2025 winner of the Arthur W. Foote Award from the Harvard Musical Association, the 2024 MI Opera Competition, the 2023 Hal Leonard Vocal Competition, the emerging artist winner of the Rochester Oratorio Society Competition and the 2022 winner of the Shirley Rabb Winston Scholarship by the National Society of Arts and Letters. She has received grants from the George London Foundation, Voce di Meche, and Gerda Lissner Foundation, and awards from the Opera Index Foundation, Orpheus Vocal Competition, and the Camile Coloratura Awards.

Prior to Curtis, Sarah attended Columbia University and the Juilliard-Exchange program. At Columbia, she sang Pamina in Mozart’s Die Zauberflöte and Rosalinda in Die Fledermaus with the Columbia New Opera Workshop, and narrated Stravinsky’s L'Histoire du soldat. She also has performed around New York City various in musical theater and cabaret-style performances, including with the Irish Repertory Theatre and at NYU.