Over 30 years' experience in multilateral diplomacy, Head of IGO, United Nations matters, prohibition of weapons of mass destruction, disarmament and non-proliferation. 2005-13, executive head of the organization in charge of global ban of nuclear weapon tests (CTBTO). 1994-96, Deputy State Secretary of Defence; chair and key negotiator for biological and chemical weapons global prohibition regimes. UN Ambassador of Hungary: 1990-93, 2003-05, Geneva; 1993, The Hague; 1997-2001, Vienna.