OCCO’s repertoire always includes Portuguese works and composers. In collaboration with the Portuguese Museum of Music, OCCO has performed recitals of Portuguese music and has cooperated in a cycle of the Didactic Concerts with pieces written by the portuguese composer Fernando Lopes-Graça, who also resided in Cascais.
The annual composition competition New Music is OCCO’s contribute to new portuguese compositions. The Artistic Direction selects the works to present on stage, where they are voted. The winner becomes OCCO’s Resident Composer during the following year.