Sarah Haessig was born in Zurich and Raised in Tessin. After successfully completing her Matura, Sarah studied at the Basel Academy of Music under the tutelage of Jacques Dünki (teacher's diploma) and at the Musikhochschule Luzern under Ivan Klansky (concert diploma). She has been a full-time composer since 2003 and studied under Roland Moser and Dieter Ammann.
She attended master courses headed by Gerard Wyss (song accompaniment), See Siang Wong, Werner Bärtschi and Galina Vracheva (improvisation).
Sarah has performed in various chamber music formations and as a song accompanist, she currently lives and works in Zurich.