 On June 6, 1964, he was ordained to the priesthood for the Diocese of Lafayette by Bishop Warren L. Boudreaux.Jacobs served as pastor, chaplain, and associate pastor of several parishes in the Diocese of Lafayette and the Diocese of Lake Charles.He has served as chairman of the National Service Committee for the Charismatic Renewal and Diocesan Director of Vocations and Seminarians for the Diocese of Lake Charles.