Brunner was born 1942 in Naters, Valais. He studied at the University of Innsbruck, Austria, and was ordained to the Catholic priesthood on July 6, 1968.
In November 2009, he declared that he was in favor of the ordination of married priests, and that most Swiss Bishops shared his view.[2]
During a Synod, Bishop Brunner insisted that the measures taken at Vatican II to promote collegiality still had not found their objective. Once again, he said with preoccupation, "what value do the pastoral needs of the local churches have for the Roman Curia?"[3][4]