Ismaïl Ould Cheikh Ahmed (Arabic: ??????? ??? ????? ?????; born 9 November 1960 in Nouakchott) is a Mauritanian diplomat and politician.
He served as a United Nations Special Envoy for Yemen from 25 April 2015.
to February 2018.Prior to that posting, Ahmed served as United Nations Special Representative for the United Nations Mission for Ebola Emergency Response (UNMEER).Prior to that appointment of 11 December 2014, Ahmed was the Deputy Special Representative and Deputy Head of the United Nations Support Mission in Libya (UNSMIL).