Masood Khan has been Pakistan's Ambassador to the People's Republic of China since September 2008. From March 2005 to September 2008, Ambassador Khan served as Pakistan's Permanent Representative to the United Nations Office and other International Organizations in Geneva. As an official of Pakistan's Ministry of Foreign Affairs, he has served in Islamabad and abroad for thirty years. In 2009, he was promoted to the highest rank – that of Federal Secretary – in Pakistan's civil service. Earlier, among other functions, he worked as the Ministry of Foreign Affairs' Director-General for the United Nations and for Disarmament, and as its spokesman. Over the years, he has acquired expertise in multilateral diplomacy, security and disarmament issues, human rights, humanitarian diplomacy, and social development. He has also specialized in international conferences, having held several leadership positions, such as President of the Conference on Disarmament, President of the 6th Review Conference of the Biological Weapons Convention, Coordinator of the Group of the Organisation of Islamic States in Geneva, Chairman of the International Organization for Migration Council, Chairman of the International Labour Conference Reform Committee, and Chairman of the Drafting Committee of the 30th International Conference of the Red Cross and Red Crescent.