The Lorenzo Ruiz de Manila School Alumni Association is the official organization of the LRMS graduates. It serves as the formal representing body for alumni affairs both inside the LRMS campus and the world at large. In partnership with its alma mater, LRMS, explores avenues for constructive cooperation and collaboration between graduates and the rest of the LRMS family of students, parents, faculty and staff, with the aim of continuing the mission of developing competent leaders in the service of God ~ the Church and the Filipino people.
The LRMSAA Kumustahan held in 2007 marks the first major milestone of the association in bringing together the graduates of Lorenzo Ruiz de Manila School. Aside from introducing the organization to the alumni and the LRMS community, the event has also served as a kick-off event for future get-together among LRMS alumni.
As a follow-through of the Kumustahan, the association has also involved itself with organizing mini-reunions per batch, giving long-estranged classmates a venue for convening to look back, rekindle old friendships and look to the future for possible opportunities.