Sydney Secondary College Instrumental Music Program (SSCIMP) includes students from across all three campuses of the college (Balmain, Leichhardt and Blackwattle Bay) and is one of the largest programs in the college.
 
There are four wind bands, three jazz groups and two string groups, with many students participating in multiple ensembles. Each ensemble rehearses once a week before school and all ensembles involve students from multiple campuses.