McGuigan was ordained to the priesthood by Bishop Louis O'Leary on May 26,1918, and then taught at St. Dunstan's University for a year before serving as private secretary to Bishop Henry O'Leary until 1922, when he was named diocesan chancellor of Edmonton.
McGuigan was ordained to the priesthood by Bishop Louis O'Leary on May 26,1918. This was before. McGuigan was serving as private secretary to Bishop Henry O'Leary until 1922. McGuigan was then taught at St. Dunstan's University for a year before. McGuigan was serving as private secretary to Bishop Henry O'Leary until 1922. He was named diocesan chancellor of Edmonton.