Levaillant started his professional career in the early 1970s. In 1973, he collaborated with
Radio France and composed
Circus Virus, a musical piece for
France Culture. His first music had inspirations from his adolescence heroes, such as
Karlheinz Stockhausen,
Jimi Hendrix and
Ornette Coleman. Through the 1970s and 1980s, Levaillant released seven more albums and published a book on music improvisation and compositions, ''L'improvisation musicale'', published by
Éditions Lattès in 1980. He collaborated with and and composed music for multiple musical shows and feature films during these years. He collaborated with and composed music for various French and international
jazz musicians such as ,
Didier Levallet,
Mino Cinélu,
Jean-Louis Chautemps,
Pierre Favre,
Bernard Lubat,
Tony Coe,
Kenny Wheeler,
Jean-François Jenny-Clark,
Michel Portal,
Barry Altschul and
Barre Phillips. In 1980, at the age of 26, Levaillant began composing
ballet music for the
Paris Opera. From 1983 to 2006, Levaillant created nearly 20 musical shows and operas that were performed around Europe. He collaborated with
Barry Altschul and
Barre Phillips to compose
Les Passagers du delta in 1986. He collaborated with
Dominique Bagouet, Stéphanie Aubin,
Brigitte Lefèvre,
Dominique Petit and Caroline Marcadé for more than 30 live shows. In 1988, Levaillant was awarded with
Prix Italia by
RAI for his work, in the category
Speakers. In 1995, Levaillant was commissioned by
Ensemble InterContemporain and
Musée du Louvre for creating music for
Fritz Lang's last
silent film,
Woman in the Moon. Later that year, he co-founded the
Cabinet de Musique Généraliste (CMG) with , an initiative aimed towards promoting contemporary music in the audiovisual world. Over the years, prominent composers and musicians like
Philippe Hersant,
Allain Gaussin, , , ,
Christian Zanési, , , Calin Ioachimescu and
Doina Rotaru became part of the
Cabinet de Musique Généraliste. In the late 1990s, Levaillant performed live at various festivals and composed several works such as
Echo de Narcisse,
Le Clair, ''l'Obscur pour quatuor à cordes
, Paysages de Conte
and Tombeau de Gesualdo''. In 2004, Lavaillant composed music for Enki Bilal's science fiction film,
Immortal. In 2002, Levaillant composed the ballet
La Petite danseuse de Degas produced by the
Paris Opera. It was premiered in 2003 at
Opéra-Garnier and was performed again in 2005 and 2010.
France 2 filmed the performance and
Arthaus released the DVD. In 2005,
l'Orchestre philharmonique de Radio France commissioned him to compose music for the children's book ''
by Jacques Prévert. In 2014, Levaillant wrote Panchamama Symphony
, a composition for concert bands. The Andean music of Bolivia inspired Panchamama Symphony''. In 2014, 15 universities in the United States invited Levaillant for the
master classes and concerts. ==Personal life==