 Archbishop Arregui Yarza was Auxiliary Bishop of Quito and Titular Bishop of Auzegera from January 4, 1990, to July 25, 1995.He served as the Bishop of Ibarra from July 25, 1995, to May 7, 2003.He was appointed Archbishop of Guayaquil on May 7, 2003, replacing Archbishop Juan Ignacio Larrea Holguín.