Led and took part in a number of international missions, including in the
self-determination process in East Timor and the peace process in Angola in 1990/1991,
head of the International IDEA (Institute for Democracy and Electoral Assistance,
Stockholm) delegation to Bosnia and Herzegovina in September 1996, and adviser to the
UN for the Project for Peace Process in Africa (Tanzania), October 1997.
Member of various informal advisory groups to the Secretary-General of the
United Nations, including the Secretary-General's Resource Group on the Democratic
Republic of Congo.