Appointed since 2011 as director of the GMEM - Centre national de création musicale de Marseille, Christian Sebille is both a director of the structure and a composer.

In 1983, Christian Sebille began studying electroacoustic music with Jean Schwartz and Philippe Prévost (Ircam), and then in 1987 mixed music with Luc Ferrari at the Muse en Circuit. In 1993, he founded Césaré in Reims, which became a National Center for Musical Creation in 2006, promoting research on diversity and on new forms of (re)presentation of musical creation.

Christian Sebille's catalog includes more than sixty vocal, instrumental, electroacoustic and mixed works, including a chamber opera(L'alleluiah - Georges Bataille - State commission), numerous pieces dedicated to theater or choreography (Jean Deloche, Nadège Mac Leay, Emmanuelle Huynh...) as well as a commission from the Limoge Opera for orchestra, choir, three percussion instruments, electric guitar and three voices. From 1999 to the present, he has created a large cycle of musical installations (series entitled Miniatures), the eleventh of which, commissioned by the City of Dijon, is particularly ambitious, as is the thirteenth, conceived for the Château d'If in Marseille.

His research is essentially directed towards the notion of space and movement. He enjoys mixing and confronting other artistic disciplines, as well as new forms of (re)presentation of contemporary music at the borders of concert, installation, cinema and performance. 

He collaborates with many artists from other artistic disciplines, notably with Francisco Ruiz De Infante (video artist). Christian Sebille develops a computerized lutherie which allows him to invest in the field of improvisation in France as well as abroad (Alex Grillo, Didier Petit, Sylvain Kassap, Pablo Cueco, Philippe Foch, Matt Bourne, Chris Sharkey, Christophe de Bezanac...).