Michael J. Sis is the sixth Bishop of the Roman Catholic Diocese of San Angelo. He oversees the Catholic Church in 29 counties in West Texas, covering an area of 37,000 square miles.

Bishop Sis grew up in Bryan, Texas. He is the son of Raymond and Janice Sis. He is the fourth of five children.

He received an undergraduate degree in Philosophy in 1982 from the University of Notre Dame in South Bend, Indiana. He studied Theology at the North American College in Rome, receiving graduate degrees from the Gregorian University in 1985 and the Alphonsian Academy of the Lateran University in 1990.

In the U.S. Conference of Catholic Bishops, he has served as a member of the Doctrine Committee, the Administrative Committee, the Committee on Priorities and Plans, and the Evangelization and Catechesis Committee.

Bishop Sis considers his most precious treasure to be his personal relationship with Jesus Christ.