Issa Jamil Kassissieh (born 1964) is a Palestinian scholar and diplomat, who since January 2017 serves as Palestinian ambassador to the Holy See and to the Sovereign Military Order of Malta.
[1] Kassissieh was born in East Jerusalem into a Greek-Orthodox family.
[citation needed] Kassissieh served in various positions involving negotiations on behalf of the PLO and the Palestinian Authority.
He served as director of International Relations department at the Orient House, Jerusalem.
Later, he joined the staff of Negotiations Affairs Department of the Palestinian Authority, and was mostly involved in negotiations with churches and on issues relating to the problem of Jerusalem.