- Susanna Agnelli (1998 – 2000), former Minister of Foreign Affairs, Italy
- Jose Ayala-Lasso (1996 – 1997), former United Nations High Commissioner for Human Rights and Foreign Minister, Ecuador
- Robert Badinter (1996 – 1997), Senator for the Hauts-de-Seine département, and former Minister of Justice, France
- Lord Carrington (1996 – 1997), member of the House of Lords and former Foreign Secretary, United Kingdom
- Uffe Ellemann-Jensen (2000 – 2003), Chairman of the Baltic Development Forum and former Minister of Foreign Affairs, Denmark
- Cornelio Sommaruga (1996 – 2000), President of the Geneva International Centre for Humanitarian Demining and former President of the ICRC
- Max van der Stoel (1996 – 2001), former OSCE High Commissioner on National Minorities and Minister of Foreign Affairs, The Netherlands
- Sahabzada Yaqub Khan (1996 – 2004), Commissioner of the Carnegie Commission on Preventing Deadly Conflict and former Minister of Foreign Affairs, Pakistan
- Michael Portillo (1998 – 2012), Former Secretary of State for Defence, United Kingdom
- Carolina Barco (2009 – 2014), former Minister of Foreign Affairs, Colombia
- Surin Pitsuwan (2016-2017), former Minister of Foreign Affairs, Thailand, and former chair of the ASEAN Regional Forum
- Wim Kok (2002-2018), Former Prime Minister, The Netherlands