Pope Leo XIV Names Monsignor Peter Bui as Phoenix Auxiliary Bishop
Pope Leo XIV has appointed Reverend Monsignor Peter Dai Bui as the Auxiliary Bishop of Phoenix. This announcement was made on December 19, 2025, by Cardinal Christophe Pierre, the apostolic nuncio to the United States. Monsignor Bui’s extensive background makes him a distinguished choice for this role within the Diocese of Phoenix.
Biographical Details of Bishop-elect Peter Dai Bui
Monsignor Bui was born on January 11, 1970, on Phu Quoc Island in Vietnam. His early education included studies at the Legion of Christ Minor Seminary. In 1989, he joined the Legion of Christ Novitiate in Cheshire, Connecticut, where he made his First Profession in 1991.
Education and Ordination
Bishop-elect Bui later attended the Pontifical Athenaeum in Rome, where he obtained degrees in philosophy and theology, as well as a licentiate in philosophy in 2003. He was ordained a priest on December 24, 2003, for the Legionaries of Christ.
Pastoral Experience
His pastoral career has spanned various roles, including:
- Chaplain at a private Catholic school in Caracas, Venezuela (2003-2006)
- Associate Pastor at Our Lady of Guadalupe Parish, Queen Creek (2007-2008)
- Associate Pastor at Christ the King Parish, Mesa (2008-2010)
- Pastor at Resurrection Parish, Tempe (2010-2011)
- Pastor at Holy Spirit Parish, Tempe (2017-2022)
From 2011 to 2016, he served as an official on the Pontifical Council Cor Unum. On December 16, 2014, he was honored with the title of Chaplain to His Holiness, Monsignor. Since 2022, he has been the Vicar for Clergy in the Diocese of Phoenix.
Languages Spoken
Bishop-elect Bui is multilingual. He is fluent in:
- English
- Vietnamese
- Spanish
- Italian
- German
His linguistic skills, combined with his diverse pastoral experience, position him well to serve the community as the new Auxiliary Bishop of Phoenix.
