(T) + 44.20.7039.5218

Sylvia Tonova is an international arbitration lawyer with 15 years of experience representing investors and states in investment treaty and commercial arbitrations. She is recognized for her "incredibly impressive work" and her "strong analytical thinking" (Who's Who Legal Arbitration) and "great understanding of clients' needs" (Chambers UK). Before relocating to Jones Day in London, Sylvia practiced for seven years at an international law firm in Washington, D.C.

Sylvia represents clients in arbitrations under all the major arbitration rules, including the International Centre for Settlement of Investment Disputes (ICSID) and the ICSID Additional Facility Rules, and was appointed to the ICSID Panels of Arbitrators and of Conciliators by Bulgaria in 2016. Her practice focuses on investment and commercial disputes arising in Eastern Europe and the Commonwealth of Independent States (CIS), including the successful representation of Bulgaria and Romania in four ICSID arbitrations. Sylvia was also part of the team that recently secured two victories against Uzbekistan on behalf of 12 partners in a leading private equity firm in Kazakhstan and a Turkish client.

Sylvia regularly advises clients on enforcement of awards, sovereign immunity issues, arbitration clauses, and protecting investments against political risk in a range of industries, including oil and gas, mining, energy, banking, and telecommunications.

Sylvia teaches enforcement of investment and commercial arbitration awards at the University of Roma Tre and is a former co-chair of Young ICCA and a former member of the Executive Committee of the Institute for Transnational Arbitration (ITA).


  • World Wide Minerals obtains arbitration award in excess of $50 million against the Republic of KazakhstanJones Day obtained an arbitration award on behalf of World Wide Minerals Ltd. ("WWM"), a Toronto-based mining company, and Mr. Paul A. Carroll, QC, WWM's President and CEO, which held that the Republic of Kazakhstan breached international law and the Canada-U.S.S.R. Bilateral Investment Treaty ("BIT") over 20 years ago.
  • Federal Elektrik Yatirim ve Ticaret arbitrates issues against Uzbekistan under Energy Charter TreatyJones Day represents Federal Elektrik Yatirim ve Ticaret A.S. and three other claimants in an ICSID arbitration against Uzbekistan seeking millions of dollars of compensation under the Energy Charter Treaty and the Turkey-Uzbekistan bilateral investment treaty.
  • Kazakh investors initiate ICSID arbitration against UzbekistanJones Day represents Vladislav Kim and 11 other citizens of Kazakhstan in an ICSID arbitration against the Republic of Uzbekistan instituted pursuant to the Agreement between the Government of the Republic of Kazakhstan and the Government of the Republic of Uzbekistan on Promotion and Reciprocal Protection of Investments.
  • Canadian mining company initiates UNCITRAL arbitration against KazakhstanJones Day represents a Canadian mining company in an UNCITRAL arbitration against the Republic of Kazakhstan.
  • Two Ghanaian companies arbitrate dispute with Ghana in ICC International Court of ArbitrationJones Day represents two Ghanaian companies with British, Canadian, and Indian shareholders against the Government of Ghana in a gold mining dispute arbitrated at the International Chamber of Commerce, International Court of Arbitration.
  • Expropriated SNS Reaal bondholders challenge legality of taking and seek compensation from Dutch StateJones Day represents bondholders in connection with the Dutch State's nationalization of SNS Reaal NV and SNS Bank NV on February 1, 2013.
  • Speaking Engagements

    • March 8, 2018
      General Principles of Law in Investment Arbitration, and the Hierarchy of Norms under International Law
    • November 29, 2017
      Arbitral Parents: Managing Parenthood in the Context of an International Practice
    • November 9, 2016
      What Does Brexit Mean for the Future of International Arbitration in London?
    • May 18, 2016
      Award Enforcement: How to Secure the Assets before They Are Gone?, GAR Live London
    • February 9, 2016
      Renewable Energy Investors in Romania
    • February 8, 2016
      The Transatlantic Trade and Investment Partnership (TTIP), British-Romanian Chamber of Commerce
    • June 29, 2015
      How to Handle an Investment Dispute?
    • June 16, 2015
      Witness Examination in International Arbitration, Young ICCA Workshop
    • June 12, 2015
      The Winning Brief – Basic Elements and Common Fallacies, ASA Below 40 Seminar
    • May 21, 2015
      Enforcing and Challenging Arbitral Awards - the Straus Institute for Dispute Resolution
    • December 10, 2014
      Joinder and Consolidation under the ICDR Arbitration Rules
    • October 21, 2013
      Enforcement against States: Investment Arbitration and WTO Litigation, World Trade Organization (WTO)
    • October 10, 2013
      How to Reduce Your Investment Risk with BITs?
    • June 7, 2013
      Illegality in Investment Arbitration, Lewiatan Court of Arbitration
    • May 22, 2013
      Enforcing and Challenging Arbitral Awards in England and Wales, Pepperdine University
    • April 5, 2011
      The Future of ICSID, Fifth Annual Investment Arbitration Conference
    We use cookies to deliver our online services. Details of the cookies and other tracking technologies we use and instructions on how to disable them are set out in our Cookies Policy. By using this website you consent to our use of cookies.