The Synod of the Melkite bishops elected him on 11 October 2006 to succeed Georges Kwaïter as Archbishop of Sidon.
On 31 January 2021, Pope Francis appointed him apostolic administrator of the Melkite Greek Catholic Archeparchy of Tyre.
[3] Haddad participated in the Special Assembly of the Synod of Bishops on the Middle East that met in Rome in October 2010.
He said the Eastern Churches connected to Rome need to demonstrate mutual solidarity to prevent Christianity from disappearing.
He asked for "a more sustainable form of support for the Oriental Churches" on the part of Rome that would recognize its role in economic development to tie Christians to their ancestral localities and create jobs.