Award Winning Spanish composer Juan J. Colomer, has collaborated with such artists as James Levine, Plácido Domingo, Christian Lindberg, Mikhail Pletnev and José Carreras. His works have been performed by the San Francisco Symphony, Vienna Symphony, Orquestre de Paris, Simón Bolívar Symphony Orchestra, Russian National Orchestra, Los Angeles Philharmonic Brass, National Orchestra of Spain, Arena de Verona Orchestra and Choir, the Budapest National Orchestra, Seoul Symphony Orchestra, Orchestra of the Valencian Community (Les Arts), San Diego Symphony, Orquesta de RTVE, Attacca Quartet, and many others throughout the world at prestigious halls like Carnegie Hall (NY), Tchaikovsky Concert Hall (Moscow), Elbphilharmonie (Hamburg), Teatro Real (Madrid) or Walt Disney Concert Hall (Los Angeles).

In 2008, the CD “Spanish Passion” by Plácido Domingo, featuring orchestrations by Colomer, won a Latin Grammy for Best Classical Album.

His ballet “Sorolla” commissioned by the National Ballet of Spain, premiered June 12th, 2013 in Madrid (Naves del Matadero).

His second opera "El Pintor" (The Painter) based on Picasso, with libretto by Albert Boadella, was commissioned by Teatro Real (Madrid) as part of the 200 year anniversary celebration and premiered Feb. 8, 2018.