Before moving to the United States, Boyer spent nine years working in German opera houses, including Staatsoper Hamburg, Staatstheater Nürnberg, Theater Kiel, Theater Bremen, and Landestheater Coburg. Her work included vocal and French diction coaching, singer and ensemble preparation, and orchestral and onstage keyboard performance in repertoire ranging from Baroque to contemporary opera. She was also invited to collaborate with Cape Town Opera’s Young Artist Program as a vocal coach for a UK tour in 2019.

With soprano Leah Gordon, Boyer won First Prize at the 2018 Elsa Respighi Competition in Verona and was a finalist at the 2019 International Johannes Brahms Competition in Pörtschach. She performs with her sister, mezzo-soprano Sophie Boyer, as Les Boyer Sisters, with programs that foreground women composers. Their filmed recital, Duo en appartement: les compositrices du 19ème siècle, is featured on medici.tv. Their CD, Sur les mots d’un compositeur-poète, released by Polymnie in 2020, presents newly composed songs on poems by Lucien Guérinel.

Boyer earned a Doctor of Musical Arts in Collaborative Piano from New England Conservatory in 2025. She also holds two master’s degrees with distinction from the Guildhall School of Music & Drama and received advanced répétiteur training at the National Opera Studio in London.