CADEIO stands for “Catholic Association of Diocesan Ecumenical and Interreligious Officers. This site serves those delegated as Ecumenical/Interreligious Officers in each Catholic Diocese in the United States and to whom is given the care of Christian Unity and understanding among faiths. We invite you to find out who we are, read more about our leadership, and review our constitution and bylaws. Discover how a full or associate membership can support your work as an ecumenical and interreligious officer.