 The OSO has frequently collaborated with other Ottawa-area music ensembles, such as the now defunct Opera Lyra, the Ottawa Youth Orchestra, the Ottawa Choral Society, the Central Youth Choir and the University of Ottawa Chorale.The University of Ottawa has had a longstanding relationship with the OSO, which includes the mentorship program (which allows advanced University of Ottawa music students to perform in the OSO).The OSO has premiered music by Canadian composers such as Jan Jarvlepp, Jean Coulthard, Robert Fleming, Andrew Huggett and Colin Mack.