After graduating from St. Pius X Seminary High School, Fr. Erno B. Diaz finished theology and philosophy from the UST Central Seminary.
Following his ordination in 1969, Fr. Erno B. Diaz served in the priestly ministry in the Philippines and later in the United States. In 2015, he retired from active ministry as an incardinated priest of the Archdiocese of New York where he served as first Filipino Pastor and Filipino Apostolate Coordinator. He founded the Blessed Lorenzo Ruiz Movement in America.
In 2019, he celebrated his 50th sacerdotal jubilee. Father Diaz has written eight books, the latest being “The Sin I Knew,” his personal recollection on the late Cardinal Jaime Sin.