Career
He is currently serving as an auxiliary bishop of the Roman Catholic Archdiocese of Los Los Angeles After his ordination to the priesthood, Brennan served as associate pastor at three parishes:
Immaculate Heart of Mary Parish in Los Angeles
Saint Linus in Norwalk
The former Cathedral of Saint Vibiana in Los Angeles
French Brennan was later a pastor at two parishes:
Saint Linus in Norwalk
Holy Trinity in San Pedro
Father Brennan also served as the Moderator of the Curia for the Archdiocese of Los Los Angeles
Father Brennan also served as the vicar general for the Archdiocese.
Joseph V. Brennan was appointed by Pope Francis Titular Bishop of Trofimiana and Auxiliary Bishop of the Archdiocese of Los Angeles on July 21, 2015. He was ordained a bishop by the Archbishop of Los Angeles José Horacio Gómez on September 8, 2015.
Archbishop Gómez has assigned Bishop Brennan as his Episcopal Vicar for the San Fernando Pastoral Region.