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Priests & DEACONS

Fr. O'


Rev. Cyril O'Sullivan - Pastor

Father Cyril J. O'Sullivan, a native of Cork, was ordained in 1980 in Ireland for the Archdiocese of San Francisco. He is our present pastor and the dean of Marin deanery. Father O' is proud of his Irish heritage. His homilies often recount stories of his faith experience rooted from his culture. Father enjoys soccer and music. He plays many instruments including the Uilleann pipes and the tin whistles. Parishioners enjoy his Irish humor and head-to-toe colorful outfits. Fr. O' can be reached at 1-415-479-1560 ext. 21.



Rev. Ephrem Tillya - Parochial Vicar

Father Ephrem R. Tillya was born and raised in Tanzania on the highlands of Mount Kilimanjaro, the second highest mountain in the world.  Fr. Ephrem has six siblings.  He went to the Seminary for priesthood formation in Tanzania and was ordained priest on July 15, 2003 in the Catholic Archdiocese of Arusha – Tanzania. Fr. Ephrem came to the United States in 2018 for a one-year chaplaincy course. Fr. Ephrem says, “I am very happy to have this opportunity to serve the people of God at Saint Isabella parish as an associate pastor and chaplain for Kaiser and Novato Community Hospital. I love the place because of the kindness and generous heart of the parishioners. I really enjoy exercising, especially jogging and hiking.” Fr. Ephrem can be reached at 1-415-479-1560 ext. 14.



Rev. Mr. Christopher Major, DeaconDeacon Christopher Major

Catholic San Francisco, June 2022 issue, excerpt from article "Becoming Deacon":

"Chris Major holds a Clear Level II Education Specialist credential from the University of San Francisco and an undergraduate degree in economics and business administration from St. Mary’s College of California.

He taught special education at the K-12 level for 18 years, after a 13-year career in insurance risk management.

He is a member of St. Isabella Parish in San Rafael. He is the marriage preparation consultant for the parish, passionate about RCIA and a member of the Knights of Columbus. He currently serves as the coordinator for African American ethnic ministry in the Archdiocese of San Francisco."

Deacon Chris can be reached at