Prior to his election as Bishop of Texas, Doyle served as Canon to the Ordinary under his predecessor, Don A. Wimberly.

In February 2020, he announced that the Episcopal Diocese of Texas would start a $13 million racial reconciliation initiative.

Doyle earned a Bachelor of Fine Arts degree at the University of North Texas, Denton, in 1990, and a Master in Divinity degree at Virginia Theological Seminary, Alexandria, Virginia, in 1995.

In 1996, he was ordained a priest at Christ Episcopal Church in Temple, Texas, where he served as assistant to the rector from 1995 to 1997.

He is the author of Unabashedly Episcopalian: Proclaiming the Good News of the Episcopal Church.