Monsignor Peter Dai Bui appointed as new bishop for Diocese of Phoenix

PHOENIX — Monsignor Peter Dai Bui was appointed by Pope Leo XIV on Friday as the new auxiliary bishop for the Diocese of Phoenix.

As part of his new role, Bui will work with Bishop John Dolan in the Diocese of Phoenix. He will continue his role as the Vicar of Clergy, a position he has held since 2022.

He is the second auxiliary bishop in the 56-year history of the Diocese of Phoenix, joining Bishop Eduardo A. Nevares, who was appointed as the first auxiliary bishop in July 2010.

“When Cardinal Pierre called with the news, I was honestly in shock — I even forgot he couldn’t see me nodding through the phone. But beneath that shock is profound gratitude to God and a deep desire to serve his people. I just want to be a good priest, now called to serve in a new way,” Bui said in an announcement.

“I am profoundly grateful for this appointment and for the trust Pope Leo XIV has placed in me. My greatest desire is to collaborate closely with Bishop John Dolan, supporting his ministry so that together we can better serve all the faithful of this diocese. I depend on God’s grace and the prayers of his people.”

More details on Peter Dai Bui

Before his arrival to the Diocese of Phoenix in 2007, Bui was ordained as a priest in December 2003. He was a missionary priest with the Legionaries of Christ, a Roman-Catholic religious order, where he served in countries such as Venezuela and Colombia and led mission trips to the Amazon jungle.

Bui has served in several church communities within the Diocese of Phoenix, including at Our Lady of Guadalupe Parish in Queen Creek (2007-2008), Christ the King Parish in Mesa (2008-2010), Resurrection Parish in Tempe (2010-2011) and Holy Spirit Parish in Tempe (2017-2022).

“I am deeply grateful to his holiness Pope Leo XIV for the appointment of Monsignor Peter Dai Bui as Auxiliary Bishop of the Diocese of Phoenix,” Dolan said. “As one of the largest and most rapidly growing dioceses in the nation, Phoenix faces increasing pastoral and administrative complexity, and bishop-elect Bui’s experience in governance, his deep care for priests and his commitment to accompaniment will be invaluable.”

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