 Brother Dizon's first assignment after returning to the Philippines was in La Salle Green Hills, where he taught math and religion in the High School department for a year before being appointed Grade School Principal in 1969, High School Principal in 1971 and Acting President in 1973.Dizon finished his primary and secondary education at the University of St. La Salle in Bacolod City, Negros Occidental.He then studied his first two years of college at De La Salle College in Manila.