[3] His initial assignment after ordination was as secretary to Archbishop Emeritus Henry Rohlman before being named associate pastor of St. John's Parish in Independence, Iowa.
From 1974 to 1976 he served as associate pastor of St. Mary's Parish and a member of the faculty of Columbus High School, both in Waterloo, Iowa.
Archbishop Emeritus James Byrne and Auxiliary Bishop Francis Dunn acted as the principal co-consecrators.
He was installed January 20, 1994, by Kucera in Sacred Heart Cathedral in the presence of the apostolic nuncio to the United States, Archbishop Agostino Cacciavillan.
After Wiebler confessed his crimes to Franklin, the bishop sent him to the Vianney Renewal Center, a treatment facility for priests in Dittmer, Missouri.
In 2004, the diocese settled the claims of 37 sexual abuse victims for $9 million dollars; one of the priests named in the settlement was Wiebler.