The Southville International School and Colleges Alumni Association (SISCAA) is the official organization of alumni of the Grade School, High School, and College divisions of Southville International School and Colleges. All former SISC students who had at least one year residency in SISC, are qualified to be members of the SISCAA.

Alumni who wish to enroll their children in Southville International School and Colleges from preschool to college may avail of a 5% discount on tuition fee upon entry and a 5% discount on tuition fee for the succeeding years of stay.