Africa
- UN Office in Angola (UNOA) (1999 - 2002)
- UN Peacebuilding Support Office in Liberia (UNOL) (1997 - 2003)
- UN Mission in Angola (UNMA) (2002 - 2003)
- UN Office in Burundi (UNOB) (1993 - 2004)
- UN Mission in Cote d'Ivoire (MINUCI) (2003 - 2004)
- UN Integrated Office in Sierra Leone (UNIOSIL) (2005 - 2008)
- UN Peacebuilding Office in the Central African Republic (BONUCA) (2000 - 2009)
- UN Peacebuilding Support Office in Guinea-Bissau (UNOGBIS) (1999 - 2009)
- UN Integrated Office in Burundi (BINUB) (2006 - 2010)
- UN International Commission of Inquiry mandated to establish the facts and circumstances of the events of 28 September 2009 in Guinea (2009 - 2010)
- UN Political Office for Somalia (UNPOS) (1995 - 2013)
- UN Integrated Peacebuilding Office in Sierra Leone (UNIPSIL) (2008 - 2014)
- UN Integrated Peacebuilding Support Office in the Central African Republic (BINUCA) (2009 - 2014)
- UN Office in Burundi (BNUB) (2011 - 2014)
- UN Electoral Observation Mission in Burundi (MENUB) (2015)
- UN Office for West Africa (UNOWA) (2001 - 2016)
- Office of the Special Envoy for the Sahel (OSES) (2013 - 2016)
- Good Offices Sudan and South Sudan (2016 - 2018)
- UN Integrated Peacebuilding Office in Guinea-Bissau (2010 - 2020)
- Office of the Special Envoy for Burundi (2016 - 2021)
- Personal Envoy for Mozambique (2019 - 2023)
- United Nations Integrated Transition Assistance Mission in Sudan (UNITAMS) (2020 - 2024)
Americas
- UN Mission in El Salvador (MINUSAL) (1995)
- UN Office of Verification in El Salvador (UNOV) (1996)
- OAS/UN International Civilian Mission in Haiti (MICIVIH) (1993 - 1999)
- International Civilian Mission in Haiti (MICAH) (2000 - 2001)
- United Nations Mission for the Verification of Human Rights and of Compliance with the Commitments of the Comprehensive Agreement on Human Rights in Guatemala (MINUGUA) (1994 - 2004)
- Good Offices Guyana - Venezuela (1990 - 2017)
- UN Mission in Colombia (2016 - 2017)
- International Commission Against Impunity in Guatemala (CICIG) (2007-2019)
- Personal Envoy of the Secretary-General for Bolivia (2019-2020)
Asia and Pacific
- UN Mission in East Timor (UNAMET) (1999)
- UN Political Office in Bougainville (UNPOB) (1998 - 2003)
- UN Observer Mission in Bougainville (UNOMB) (2004 - 2005)
- UN Office in Timor-Leste (UNOTIL) (2005 - 2006)
- UN Mission in Nepal (UNMIN) (2007 - 2010)
Europe
Middle East and West Asia
- UN Special Mission in Afghanistan (UNSMA) (1993 - 2001)
- UN Tajikistan Office of Peacebuilding (UNTOP) (2000 - 2007)
- UN International Independent Investigation Commission (UNIIIC) (2005 - 2009)
- UN Commission of Inquiry into the facts and circumstances of the assassination of former Pakistani Prime Minister Mohtarma Benazir Bhutto (2009 - 2010)
- OPCW-UN Joint Mission in Syria (2013 - 2014)