Jerónimo Castelló obtained the Master in Orchestra Conducting at the Conservatory of Music Katarina Gurska (Madrid). He trained with conductors such as Cristóbal Soler, Arturo Tamayo, Borja Quintas, Bruno Aprea, Vladimir Ponkin, Enrique Garcia Asensio, Luis Sanjaime and Lorenzo Ramos.
He has won several prizes, including the Third Prize - in the "II Vila d'Alcàsser Youth Band Competition" with the Youth Band of the Ateneu Musical Schola Cantorum (2013) and the First Prize and Gold Medal in the "XVI International Contest of Address José Ferriz - Montroy (2010).
His conducting experience has been quite versatile, having conducted a wide repertoire and a variety of groups, including the Russian orchestra of young virtuosos "The Pearl of Moscow" and the Astrakhan Chamber Orchestra (Russia).
He is currently the principal conductor of the Vivaldi Orchestra of La Vall d'Uixó (Castellón), with which he is creating a social, artistic and pedagogical project, and artistic director of the Unió Musical del Grao de Castellón. In addition, he was appointed assistant director of the Youth Orchestra of the Federation of Musical Societies of the Valencian Community (FSMCV) for the 2018-2019 season.