Wagle enrolled as a student at MF Norwegian School of Theology in 1962, and graduated in 1968 with the candidate.theol. The following year he graduated from the Practical Theological Seminary at MF. He also studied in 1966-1967 in Berlin with a Willy Brandt Scholarship.
Degree. His first post was serving as an army chaplain (1970) before working as a vicar in Sørreisa in the Diocese of Nord-Hålogaland from 1970-1975. From 1981-1988 he worked as director of the institute Church Educational Center (IKO), and in 1988 he became the Dean of the Nidaros Cathedral. In 1991, he became the bishop of the Diocese of Nidaros and was succeeded by Tor Singsaas upon his retirement in July 2008.
He retired in 2008 due to health reasons.
On 23 June 1991, he was part of the consecration ceremony at the Nidaros Cathedral for the new king, Harald V. He also led the wedding ceremony at the Nidaros Cathedral for the king"s daughter Princess Märtha Louise and Ari Behn on 24 May 2002.
