Argentinian and Swiss saxophonist, Andrés Castellani started his music studies in Buenos Aires. Afterwards, he continued with Marie-Bernardette Charrier in the Conservatoire National de Musique de Bordeaux, and finished a Master's degree in the Académie Supérieure de Musique de Strasbourg, under the direction of Philippe Geiss. 

He is now doing a Master's in Pedagogy in the HKB of Berne with Christian Roellinger. 

As an advocate of new music, he was a member of several Contemporary Music Ensembles: Ensamble LEMC (Buenos Aires), No Input (Paris), Miradas Cruzadas (Strasbourg), Ensemble Container # GVA (Geneva), and Macunaiming Ensemble (Strasbourg).

He also worked with different composers in order to create a new saxophone repertoire: Santiago Diez Fischer, Matias Giuliani, Martín Proscia, Roberto Azarreto, Ezequiel Esquenazi (Argentina), Javier Muñoz (Chile), Tomás Gubistch (France-Argentina), Renaud François, Jean-François Zygel (France), Isandro Ojeda-García (Spain), and Stylianos Dimou (Greece).

As a classical saxophonist, he performed with the Orchestre Philharmonique de Strasbourg, Orchestre Symphonique de Mulhouse (France), Orquesta Estable del Teatro Argentino de La Plata, and the Orquesta  Estable del Teatro Colón (Buenos Aires).