 O'Connor was ordained at St. John Lateran on 30 March 1895.O'Connor served as curate at St. Joseph's in Bradford, England, and later at St. Marie's, Halifax, West Vale and St. Anne's, Keighley.From 1909 to 1919, the then Father O'Connor was parish priest of Heckmondwike, where he helped build the Church of the Holy Spirit.