The Old Columban Association, better know as the OCA, is the alumni society of St. Columbas. OCA connects its members to each other and to the past, present and future of St. Columbas School.
OCA connects its members to each other and to the past, present and future of St. Columbas School. Its mission is to praise, promote and protect St. Columbas School and its students, and to unite, inform and involve alumni and friends in fellowship and support of each other and the school.