His appointment as auxiliary bishop in the Maronite Archdiocese of Antioch was on 7 June 1991 as his appointment as Titular bishop of Tarsus dei Maroniti.
His appointment as auxiliary bishop in the Maronite Archdiocese of Antioch was on 7 June 1991. Moreover, Matar was appointed Titular bishop of Tarsus dei Maroniti.