She has a degree in Law (1998) and International Economic Affairs (2008) of National Taras Shevchenko University (Kyiv, Ukraine). She is a fellow of Geneva Center for Security Policy and Georgetown University School for Foreign Service.
In 2001 Olena started to work in the Ministry of Justice of Ukraine: in 2001 – 2005 heading the Department of International Law, in 2005 - 2011 heading the State Department on Approximation of Legislation, in 2011 -2013 heading the Department on Liaison with State Authorities. Afterwards she moved to the corporate affairs sector.
In August 2014 she was appointed as the Deputy Minister of Foreign Affairs of Ukraine. Her portfolio includes among others European affairs and international law.
Olena was a leading negotiator of Association Agreement between Ukraine and the EU (Trade and Sustainable Development, Energy, Competition, General and Institutional Provisions). She was responsible for Ukraine’s visa liberalization process with the EU. She leaded Ukrainian delegations in trilateral talks between Ukraine, Russia and the EU on economic and trade implications of the Association Agreement on Russian economy in 2014-2015, as well as participated in trilateral talks on Winter Packages 2014-2015, 2015-2016.
Olena is the Agent of Ukraine in cases against Russia in International Court of Justice on application and interpretation of Convention on Suppressing Financing of Terrorism and Convention on Elimination of All forms of Racial Discrimination and in the Dispute Concerning Coastal State Rights in the Black Sea, Sea of Azov, and Kerch Strait under UN Convention on the Law of Sea.
Currently she leads at senior official level trilateral talks between Ukraine, Russia and the EU on modalities of post-2019 contract for supply of Russian gas to the EU.