The Special Representative of the Secretary-General for Western Sahara (SRSG) is appointed by the Secretary-General to lead the United Nations Mission for the Referendum in Western Sahara (MINURSO).
Controversy
At least two Special Representatives (Johannes Manz and Francesco Bastagli) had resigned from their post in protest against Moroccan political manoeuvres.
References
Special Representative of the Secretary-General for Western Sahara Wikipedia(Text) CC BY-SA