Javier Sáez began his trombone studies under Félix García at the Ateneo Musical «Schola Cantorum» in la Vall d'Uixó (Castellón, Spain). In 2009, he completed his Professional Music Studies in Trombone at the local conservatory, graduating with the Extraordinary Graduation Prize (Premio Fin de Grado).
In 2013, he earned his Bachelor of Music (Higher Degree) in Trombone Performance at the Real Conservatorio Superior de Música de Madrid (RCSMM) under José Enrique Cotolí, graduating with Honors (Matrícula de Honor) in his final degree recital. In 2018, he further completed his Professional Music Studies in Tuba and Euphonium at the «Manuel de Falla» Professional Music Conservatory in Alcorcón, once again receiving the Extraordinary Graduation Prize.
His pedagogical and research profile is built upon a triple university master's degree: Master's in Teacher Training (UCM, 2015), Master's in Music Pedagogy (UNIR, 2022), and Master's in Instrumental Pedagogy (UAX, 2025). In the professional circuit, he has participated in the recording of prominent soundtracks such as «Otros Mundos» for Movistar+ and «Klaus» for Netflix, as well as studio albums including «Incendios» by Conchita with Mad4Strings, while balancing symphonic orchestral collaborations with an established teaching career.