After having successfully trained as a plasterer and painter, Josquin signed up to study as a professional electric guitar player at EJMA (Ecole de Jazz et de Musique Actuelle in Lausanne). However, after a series of events, he decided to change to classical music studies a year later as a student of Dagoberto Linhares at Lausanne's HEMU (Haute Ecole de Musique). This contrasting turn in music allowed him to diversify and enrich his musical sound palette. To further widen the scope of musical discovery, Josquin decided to spend a year studying at Berlin's Hochschule für Musik Hanns Eisler. Having returned to Switzerland, he obtained his BA and MA in musical education in the class of George Vassilev, while also taking courses in composition with William Blank.

Strongly encouraged by his professors, Josquin went on the study for his MA in composition in 2015 under Xavier Dayer at Bern University of the Arts (HKB), obtaining his degree in September 2018. Josquin continues to cultivate and develop his musical creativity by composing and collaborating on a regular basis with various musicians and groups, whose styles range from jazz to baroque music.

Josquin plays the guitar as part of Mérion (a two guitar and violin trio), whose musical repertoire consists entirely of pieces composed by him. His musical sensitivity combines darkness and depth with a luminous touch to produce a musical immersion in an original and poetic universe.

As a parallel to his creative work, Josquin teaches classical guitar at musical academies in Vevey (CMVR) and Yverdon (CMNV).

To this day, Josquin's projects have taken a combination of diverse paths such as :

Les reflets de l'obscurité (2019) - pieces for solo guitar performed by Johan Smith (winner of the 2019 GFA) on tour in North America, China and Switzerland ;

Les dentelles du cygne (2019) and Les vestiges d'une galaxie (2018) - pieces performed in Europe by George Vassilev and Irina-Kalina Goudeva ;

Ballade dans un néant controversé (2018) - performed by the ensemble Polytheistic Tema from Karlsruhe ;

L'araignée ivre (2017) - piece for 100 musicians ;

Construire sur un nuage (2017) - performed by the ensemble Proton ;

Twelve pieces for a string ensemble commissioned as part of Julien Vergère's performance « Avec Elle » and recorder at L'Heure Bleue in La Chaux-de-Fonds (2017) ;

Several acousmatic pieces created using sound samples from around the world, among which Ping-Pong sur Amukta (2017), Départ en ozone, Vide raisonnant, Derniers instants (2016) Une façon de mourir (2015) and L'atelier en bois (2014).

In 2020 Josquin is working on a collaboration with Parisian writer Julie Ménard for the Dutch ensemble Asko Schönberg, to be performed at the Festival d'Avignon.