 He taught for several years on the faculty of Canon Law at the University of Navarre, where he also was involved in establishing the School of Liberal Arts.For seventeen years, Msgr.Stetson was the vicar of Opus Dei in Chicago, during which time priests of the Prelature of Opus Dei were entrusted with operating a parish of the Archdiocese of Chicago, St. Mary of the Angels, and renovating one of the Archdiocese's largest church buildings.