Feb. 23, 1929: Born in Camden, N.Y., an only child, to James G. Costello and Ethel Dupont Costello. His mother was a teacher, then school administrator in Rome public schools; his father was a grocery-store owner and later manager of a food store in Rome.
June 5, 1954: Ordained a priest at the Cathedral of the Immaculate Conception, Syracuse, by Bishop Walter A. Foery.
1954-59: Assistant pastor, Our Lady of Lourdes, Syracuse; secretary of Diocesan Tribunal ’58-’59.
March 1965: Joined the march to Montgomery, Ala., in support of civil and voting rights.
1960-75: Diocesan superintendent of schools.
June 2, 1965: Named Papal Chamberlain.
Dec. 21, 1971: Papal honor; named Very Reverend Monsignor Domestic Prelate.
1975-78: Pastor of Our Lady of Lourdes, Syracuse.
Jan. 10, 1978: Appointed by Pope Paul VI as Right Reverend Monsignor Auxiliary to the Ordinary of Syracuse.
March 13, 1978: Ordained Auxiliary Bishop at the Cathedral of the Immaculate Conception.
January 1979: Named Vicar General in Syracuse and served as Vicar General to Bishop Frank J. Harrison and Bishop Joseph T. O’Keefe.
October 1981: Named Regional Vicar for Southern Region in Binghamton, succeeding Msgr. Eugene M. Yennock.
1995: Appointed by Bishop James M. Moynihan as Vicar General again.
1999: Received Lifetime Achievement Medallion from Catholic Charities of Onondaga County.
March 2001: Served as Grand Marshal of the Syracuse St. Patrick’s Parade.
2004: Officially retired as Auxiliary Bishop. Continued to be Vicar General and Vicar for Priests. Recognized by then state Sen. John A. DeFrancisco for 50 years in the priesthood, proclaimed on the floor of the Senate.
2009: Stepped down as Vicar General.
Jan. 27, 2017: Received the 2017 Light the Way Award for serving diocesan Catholic schools with distinction. The late retired Bishop James M. Moynihan also received the award.