Since 2002 he has been a professor at the Hochschule für Musik und Theater in Zurich. He also teaches at the Darmstadt Internationales Musikinstitut and he is director of the Paris Conservatoire Municipal W.A. Mozart. Since 1981, Gallois has been a member of the Ensemble intercontemporain. He is also in great demand as a solo performer of post-war music. His solos have included the French premiere of Karlheinz Stockhausen's In Freundschaft (1984) and the world premieres of Pierre Boulez’ Dialogue de l’ombre double for bassoon (1995) and Wolfgang Rihm's Psalmus (2007) for bassoon and orchestra. One of the high points of Gallois' career has been performing the world premiere of Sequenza XII by Luciano Berio (1995), which was written for him especially. Other composers have also written bassoon music with Gallois' unparalleled control and expression in mind, among them György Kurtág, Olga Neuwirth, Philippe Fénelon and Brice Pauset. In 2009, Gallois published Die Spieltechnik des Fagotts (The Techniques of Bassoon Playing), which he wrote for instrumentalists as well as for composers to familiarise themselves with the bassoon's possibilities.