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Who's Who Legal
Who's Who Legal

Global Leader

Arbitration 2021

Professional Biography

WWL Ranking: Recommended

Peers and clients say

"Sylvia Tonova possesses a vast legal knowledge and know how; she is responsive, well balanced, practical and provides ground-breaking solutions"
"She is an expert in investment arbitration, with a particular strength in CIS disputes"


Sylvia Tonova is an international arbitration partner at Jones Day in London.  She has more than 15 years of experience representing both investors and states in investment treaty and commercial arbitrations. She is ranked as a "global leader" in international arbitration and recognized as "an accomplished and excellent lawyer" by Who's Who Legal (WWL), who is known for her "incredibly impressive work," her "strong analytical thinking" (WWL), and "great understanding of clients' needs" (Chambers UK). The Legal 500 has described her as "outstanding legal counsel, very knowledgeable and very passionate about her work"; "a naturally gifted lawyer, " "always calm under pressure"; and "clients love her business-savvy approach to disputes." Clients and peers laud her "impressive" cross-examination skills and say she is "very client-friendly, meticulous and always delivers quality for the client" (Chambers UK).

Sylvia handles complex disputes across Europe and the Middle East, Latin America, Asia, and Africa in a range of industries, including mining, oil and gas, energy, banking, and telecommunications. She is noted as an "international arbitration expert" in disputes arising in Eastern Europe and the CIS (Legal 500). Sylvia also advises clients on arbitration clauses, sovereign immunity issues, and protecting investments against political risk.

Sylvia was appointed to the ICSID Panel of Arbitrators by Bulgaria in 2016. She teaches investment treaty arbitration procedure and enforcement of awards at Roma Tre Law School and sits on the Advisory Board of the Institute for Transnational Arbitration (ITA).  Sylvia is qualified to practice law in New York, the District of Columbia and England and Wales.

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