Later he formed the Jean-Lou Treboux Group with whom he recorded two albums: December Rain and Paths.  The latter features trumpetist Matthieu Michel and was released at the Schaffhauser Jazzfestival and Cully Jazz Festival. The band won the Crédit Suisse Award and was among the finalists of the Jazz à Juan Révélation competition in 2012.

Treboux later moved to New York to further his musical studies with saxophonist Bill McHenry.  During his stay he performed frequently with local musicians such as Colin Stranahan, Rick Rosato, Arthur Hnatek, Danny Meyer, Francesco Ciniglio, Jacob Sacks, Roman Filiu, Dean Johnson, Dave Miller, among others. 

Since his professional debut, Treboux has performed internationally with many great musicians such as Eddie Henderson, Grachan Moncur III, Alvin Queen, Glenn Ferris, Jorge Rossy, Gustav Lundgren, Flavio Boltro, Guillaume Perret, Grégoire Maret, Perico Sanbeat and Art Lande.