Xavier Dayer was born 1972 in Geneva (Switzerland). He studied composition in his hometown with Eric Gaudibert and later with Tristan Murail and Brian Ferneyhough in Paris (IRCAM).
Winner of several prizes for composition, (including the Bürgi-Willert Foundation, awarded by Heinz Holliger, and the FEMS Prize of the Sandoz Foundation, awarded by Henri Dutilleux), he has composed for the Grand Théâtre de Genève, l’Atelier lyrique de l’Opéra de Paris, le Festival d’Automne de Paris, IRCAM, the Swiss Chamber Soloists, Contrechamps and many other musicians.
Xavier Dayer teaches composition and music theory in Bern (HKB). Since 2009 he has been head of department of the Master of Arts in Composition and Theory. He was a scholarship student at the Villa Medici in Rome (2008-2009).