[2] Fillon studied classical music and oboe at national academies of Aubervilliers and Versailles and then at l'Ecole Normale Supérieure de Paris.

After 1991, he conducted the Jazzogène Orchestra with which he recorded several CDs and played as a soloist with Antoine Hervé, Lauren Newton, Claudio Pontiggia and Franck Tortillier.

During this period, he also met Nguyên Lê, Pierre Blanchard, Lauren Newton, Claudio Pontiggia, Yves Torchinsky, Pierre-Marie Bonafos.

Since 2001, Fillon's began writing numerous compositions in order to introduce the oboe and English horn's originality in improvisation (selected at the European audition of the Paolo Damiani National Jazz Orchestra, recording of several radio broadcast on France Musiques, creation of Ad Lib Production).

In early 2002, he recorded his own oboe and English horn composition with Denis Leloup, Pierre Blanchard and Joël Grare.

In 2004, he created the "De L'air quartet" with Carole Hémard, Yves Torchinsky et Xavier Dessandre, and recorded "Flea Market".

In early 2006, he created Privé de Désert in the frame of the Les Mureaux jazz festival "Ca Va Jazzer".