Education
In 1992, he received his Doctor of Philosophy in pastoral theology and catechesis in the Pontifical Lateran University.
In 1992, he received his Doctor of Philosophy in pastoral theology and catechesis in the Pontifical Lateran University.
Since 2012 Lahham is the Patriarchal Vicar to Jordan of the Latin Patriarch of Jerusalem. On 24 June 1972, Lahham was ordered Catholic priest in Jerusalem. He later became Fidei donum in Dubai and vicar and priest in Jordan.
In 1994, he was promoted to the presidency of the Latin Seminary in Beit Jala.
On 8 September 2005 Lahham was appointed Bishop of Tunis by Pope Benedict XVI, and was officially ordered on 2 October of the same year in the parish church of Beit Jala by Latin Patriarch of Jerusalem, Michel Sabbah. On 22 May 2010 Pope Benedict XVI raises the Diocese of Tunis to Archdiocese, and gives to Maroun Lahham the title of Archbishop of Tunis.
Less than two years later, on 19 January 2012 Lahham was recalled to Middle East where he became Auxiliary Bishop and vicar of the Latin Patriarch of Jerusalem for Jordan. He received the title of Titular bishop of Medeba and maintaining, as an individual, the dignity of archbishop.