Martin was the Special Representative of the Secretary-General and Head of the United Nations Support Mission in Libya from 11 September 2011 until 17 October 2012 when he was succeeded by Tarek Mitri.[1] With Georg Charpentier as his Deputy, he led a staff of 200 tasked to assist with a range of duties including electoral assistance and police training.[16] On 10 May 2012 Martin told the United Nations Security Council that there were credible reports of loyalists to toppled leader Muammar Gaddafi being mistreated and even tortured to death in detention centres under the transitional government's control.[17] In April 2012, a bomb was thrown at a convoy in which he was travelling.[18] On 8 August 2012 Martin was present in Tripoli as the National Transitional Council handed over power to the General National Congress.[19]