Although nominally independent, he is affiliated with the Liberation and Development bloc led by Amal Movement headed by Parliamentary Speaker Nabih Berri.

After graduating with a BA in Business Administration from the American University of Beirut in 1973,[3] Jaber founded a financial company in the capital and worked there until the beginning of the Lebanese Civil War in 1975.

Jaber spent 1976-1978 abroad, working mainly in Saudi Arabia, Africa, Britain and Los Angeles in the contracting and international trade sectors, and returned to Lebanon to launch real estate, tourism and hotel projects in Beirut.

From 1981, he primarily resided in London where he was a member of the Board of Directors of the British-Lebanese Friendship Society and of the Advisory Council of the Arab Community in Britain.

[7][8] Considered a liberal politician, Jaber supports what he believes as human rights through equitable economic development in other countries such as in South Africa [9][10][11]