Between 1980 and 1997 Mansour was auxiliary bishop, he took mainly administrative functions. He was from 1997 to 2002 Curial Bishop in the Patriarchate of Antioch and at times patriarchal administrator. His broader range of tasks included the co-consecration of bishops, such as when Joseph Kallas, SMSP, George Riashi, BC, Boutros Mouallem, SMSP, Fares Maakaroun, Georges Kahhale, BA, Salim Ghazal, BS, Joseph Absi, SMSP and Elias Rahal, SMSP. On 17 October 2002 Archbishop Jean Mansour, according to age retired and was, until his death on 17 November 2006 Emeritus Bishop.
