After joining Jordan's foreign service in 1991, Hassan was posted abroad to Washington D.C. and Geneva. From 2006 to 2009, he was director of the International Affairs Department at the
Royal Hashemite Court. He was appointed Minister of Planning and International Cooperation in 2009, a position he held until 2013. In 2014, he became chief of staff of the office of Jordan's King
Abdullah II. In 2018, he was appointed deputy prime minister for economic affairs, and tasked with implementing reforms to cut public debt. In 2021, he became director of the office of the king. ==Prime Minister==