His professional career became s a deputy minister for foreign Affairs of Ukraine between 1995- 1998. He represented Ukraine in the Joint Compliance and Inspection Commission under the START- 1 Treaty, Standing Control Commission under the ABM Treaty, Head of Ukrainian delegations to the major conferences on international security issues held under the UN aegis at this time. In 1996 – Plenipotentiary of Ukraine to the G8 Summit on nuclear security held in Moscow. Head of National Committee of Ukraine for Disarmament; Deputy Chairman of the State Commission of Ukraine on Export Control Policy(1993- 1998). He served as Ambassador of Ukraine to the Kingdom of Belgium, the Kingdom of the Netherlands and the Grand Duchy of Luxembourg, Head of Mission of Ukraine to NATO, Permanent Representative of Ukraine to the Organization for Non-Proliferation of Chemical Weapons in the Hague.