Kęstutis Sadauskas is a Lithuanian national.
He holds Master degrees from Vilnius University in Political Science/International Relations and Geography.
From 1993 until 2006 he worked at the Lithuanian Foreign Service on multilateral issues.
In September 2006 Kęstutis Sadauskas was appointed Head of the Representation of the European Commission in Vilnius.
From April 2010 until October 2014 he was Head of the Cabinet of Commissioner Algirdas Šemeta responsible for Taxation, Customs, Anti-fraud, Audit and Statistics.
From November 2014 Kestutis Sadauskas has been the Director for Circular Economy and Green Growth at the DG Environment of the European Commission.