Sarah Johannsen was born in the State of Minnesota (USA). She made her debut in Germany at the Oldenburg Theatre as Isolde in Wagner's Tristan und Isolde and then in the Braunschweig and Augsburg Theatres as Brünnhilde in Götterdämmerung.
Following this she was Elektra in Strauss's opera in Bremer, Darmstadt and Lübeck and Senta in Der Fliegende Holländer at the Leipzig Opera.
In New York she performed various Wagner roles at the National Opera Company and made her debut in Tosca; as well as this she performed at Carnegie Hall in Wesendonck Lieder by Wagner and Verdi's Requiem. Again in New York she interpreted roles in French Operas which are rarely performed: Pénélope by Fauré, Ariane et Barbe-Bleue by Dukas and Les Dialogues des carmélites by Poulenc.
The soprano's repertoire also includes operas by Verdi: Nabucco, Aida and Otello. Over the last few years she has given numerous concerts in Europe and the United States.