Jacobus was the
Curate at Trinity Church,
Wauwatosa, Wisconsin until being called to be
Vicar of Grace-Holy Innocents Parish in
Hartland, Wisconsin in 1974. One year later, Grace-Holy Innocents became a Parish (changing its name to St. Anskar's), and Jacobus was called as their first
Rector, In 1980, he was called by St. Matthias Church,
Waukesha, Wisconsin, to be their Rector. He served in this capacity until being elected Bishop. During his years of ministry, Jacobus has served as member or chair of many Committees and Commissions, both ecclesiastical and secular. These include Standing Committees, Commissions on Ministry, Departments of Congregational Development, as well as the City of
Waukesha Equal Opportunity Commission, the Board of the UP Connection, and the Board of the Visiting Nurses Association. He has always been involved in and supportive of
Ecumenical ventures, serving on the Anglican/Roman Catholic Dialogue Committee, and assisting the Churches of Greater Waukesha to develop programs of outreach to the needy. In addition, Jacobus was involved in spiritual renewal movements, serving as Spiritual Director for the
Cursillo Movement in the
Episcopal Diocese of Milwaukee. He was a clergy Deputy to
General Convention from the Diocese of Milwaukee for four consecutive Conventions beginning in 1982. == Election as bishop ==