On the administrative level, Hanania was the Director of the King Hussein Medical Center (KHMC) from 1973-1976. He then became Director of the Royal Medical Services of the Jordan Armed Forces from 1976-1988. Under his leadership, the Royal Medical Services experienced an intensive and steady program of expansion and improvement to become one of the premier institutions of medical care in the region. He was also Chief of Cardiovascular Surgery at KHMC from 1973–1992 and the Director General of the National Medical Institution from 1987-1989.