Ordained as a priest in the Episcopal Church of the United States and later a suffragan bishop in the Diocese of Arkansas and the Southwest, Demby worked against racial discrimination and for interracial harmony, both within and outside of his church.
Ordained as a priest in the African Methodist Episcopal Church and then the Episcopal Church of the United States, he later was elected suffragan bishop for Arkansas and the Southwest, one of the first African American consecrated. Rt. Rev. Demby worked tirelessly against racial discrimination and for interracial harmony, both within and outside of his church.