Benoît was born in 1961 in Rennes, France. At the age of 11, he acquired his first guitar, and by 1979, he transitioned to playing the electric guitar, later taking up the bass guitar. In 1983, he joined an unnamed band in Villejean Université, Rennes, where they covered songs by bands such as Siouxsie & The Banshees and Marquis De Sade. The group soon sought to add a female vocalist and, by the end of that year, met Nathalie Cousin, who later became known as Billy Ze Kick. Nathalie had recently returned from London, where she had immersed herself in the punk scene, and moved to Rennes to pursue her English degree, drawn by the city's musical reputation.

The band eventually adopted the name [b]Les Passants[/b]. In the same year, Benoît became a member of La STPO. However, in early 1985, Les Passants disbanded, leading to the formation of [b]Le Kâ[/b], with Cousin on vocals, Jean-Christophe Masson on guitar, Luc Nanpon on keyboards, and Didier Larive on trumpet, while Benoît played bass and operated a Roland TR-606 drum machine. That year, he also established a non-profit organization called Les Productions Du Fer, which managed STPO and several other bands, including Splassh and The European Sons. Le Kâ disbanded in 1988.

Around this time, Jean Vautrin published a novel titled [i]Billy Ze Kick[/i], which resonated with Nathalie. She chose to adopt the name for her new band, bringing the original members along. Careil took on the name Monsieur Bing, while Nathalie's brother Benoît Cousin became Boby T. Bang. Initially relying on a beatbox, they were soon joined by Jean-Christophe Bénic, known as Colargol (2), who had previously drummed with Verska Vis. Benoît recorded all the tracks for Billy using a 4-track recorder in his home in Rennes; some of these tracks would later be compiled by Grignou Production from Canal B. In early 1992, they signed an edition contract with BMG. By the end of that year, several labels expressed interest in signing the band, but they withdrew upon reviewing the provocative lyrics of "Mangez-moi, mangez-moi." Facing the prospect of disbandment, Benoît persuaded Nathalie to release an album containing previously recorded material, including tracks from Les Gamins En Folie, their side project for live performances, and others as a nod to their shared interest in RPGs.

In April 1993, the album Billy Ze Kick Et Les Gamins En Folie was released, receiving significant airplay from Edouard Baer and Ariel Wizman during the summer, and later attracting attention from journalists at [i]La Grosse Boule[/i] on Radio Nova. A distribution company called Media 7 quickly found itself overwhelmed by demand. The band was offered a programming spot at Trans Musicales De Rennes that year but declined an offer from Ubu, Rennes, associated with Hervé Bordier. Instead, they were granted the opportunity to create a Barnum in old Rennes, which sold out every night with the motto: "No smoking, G's only!"

Their label, Piranha, under BMG, launched its own imprint: Shaman, licensing the album in April 1994. Within a month, they sold 100,000 records, earning a Disque D'or certification, and by September, sales had reached 300,000 copies. In the fall of that year, a policeman from Nantes filed a complaint regarding alleged incitement to drug use, bringing national attention to psilocybin, the hallucinogenic mushroom referenced in Mangez-Moi ! Mangez-Moi !. By the end of the year, the band chose to take a hiatus.

Benoît later produced Nathalie's solo album [r=446398], released in 1995 under Les Productions Du Fer, recorded with -M-. He sold his rights to Billy Ze Kick to Polygram for a significant sum and produced albums for several friends, including Demain Les Poulpes, Les Nains De Jardin, and Les Raggamins, as well as Sloy's debut LP, initially recorded by Rosebud but sold to Benoît by Alan Gac. The company was sold to Yann Hamon, which established Yapucca Productions in 1997.

Reentering the cultural scene, Benoît became the head of a non-profit organization called [i]Le Collectif[/i]. With support from Martial Gabillard, who would later direct L'Orchestre De Bretagne, he helped establish Le Jardin Moderne. Benoît served as the director from 1998 to 2000 and then as president until 2004, also directing a Celtic music festival called Bol d'Eire in Noyal-Châtillon-sur-Seiche for nine years.

After stepping away from these responsibilities, Benoît reformed with Billy Ze Kick to release "Verdure & Libido" in 2001, under a new production company established for the occasion, Pudding Productions. This production house also released Les Oisives (a duet between Soazig Le Lay and Sylvie Jourdan), The Milk (2) (Soazig's solo project), Fannytastic, Carbel, and various other projects.

Since 1998, Benoît has been politically active in the ecological movement and local civic life, which led him to create an indie network called "Labels A Rennes." He is a member of Europe Ecologie Les Verts, an ecological political party in France, and in 2008, he was elected to the city council, where he currently serves as the deputy for culture in Rennes.