Dr Mohamed Ibn Chambas is a Ghanaian politician, lawyer, diplomat and academic. He is currently the African Union High Representative for Silencing the Guns. He previously served as Special Representative of the United Nations Secretary-General for West Africa and Head of the UN Office for West Africa from 2014 to 2021. Chambas was the Joint Special Representative of the African Union–UN Hybrid Operation in Darfur and the Joint Chief Mediator in charge of the Darfur peace negotiations between 2013–14. From 2010 t0 2013, he was the Secretary General of the African Caribbean and Pacific Group. He served as President of the 15-member Economic Community of West African States (ECOWAS) from 2007–2010 as well as the Executive Secretary of ECOWAS starting in February 2002, when ECOWAS was a Secretariat.