Dalius Čekuolis
Previously , he served as the President of the United Nations Economic and Social Council ( ECOSOC ) , a primary organ of the United Nations ( 2007 ) , Chair of the Third Biennial Meeting of States to Consider the Implementation of the United Nations Conference on the Illicit Trade in Small Arms to Prevent , Combat and Eradicate the Illicit Trade in Small Arms and Light Weapons in All its Aspects ( 2008 ) , Co-Chairman of the Ad Hoc Working Group on the Revitalization of the General Assembly ( 2010-2011 ) , as well as the Vice-minister of Foreign Affairs and an ambassador of Lithuania to several European countries . 
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