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Future Leaders

Future Leaders

Constantinos Salonidis

Constantinos Salonidis

Foley Hoag LLP1717 K Street, NWWashingtonDistrict of ColumbiaUSA20006-5350

Future Leader

WWL Ranking: Future Leader

Peers and clients say

"He has encyclopaedic knowledge of all things international law"

"Constantinos is a prolific researcher and writer, and a true craftsman in the presentation of legal argument"

"Has full control over very complex cases"

"He showcases a strong work ethic, enthusiasm and a positive outlook"

"He is a creative thinker with innovative and compelling arguments"


Constantinos Salonidis is a partner with Foley Hoag’s international litigation and arbitration department in Washington, DC. He is dual-qualified in civil law and common law, and is admitted to practise in New York and Greece. His practice focuses on international dispute resolution before the International Court of Justice and arbitration panels administered under the ICSID, UNCITRAL and ICC Arbitration Rules. He also serves as arbitrator in international commercial disputes.

Constantinos has significant experience in investment treaty arbitration matters, having represented sovereigns in cases involving a wide array of industries such as automobile manufacturing, banking, cable television services, health insurance, hydrocarbons, mining, port operations, solar power, steel manufacturing and tobacco. He has served as counsel to: Belgium in defeating on jurisdictional grounds a US$2 billion ICSID claim by Chinese insurer Ping An; India, in an UNCITRAL claim brought by French logistics and transport company Louis Dreyfus SAS (India’s very first victory in investment treaty arbitration); Uruguay, in the landmark ICSID case brought by Swiss tobacco company Philip Morris International; Slovakia, in two UNCITRAL arbitrations brought by Austria’s EURAM Bank and Dutch insurance company Achmea; and Qatar, in the country’s first ICSID arbitration initiated by Jordanian investors in a cable television franchise. He has also successfully represented in several investment arbitration cases Ecuador, Ukraine and Venezuela, and is currently representing Croatia in two investment treaty arbitrations, as well as Nepal in its first ICSID arbitration.

His experience in interstate litigation includes his ongoing representation of Qatar in several cases before the International Court of Justice, the Council of the International Civil Aviation Organization, and other international legal fora arising out of the measures imposed by the UAE, Saudi Arabia, Bahrain and Egypt against Qatar. Constantinos has also served in the past as counsel to the Philippines, in the historical arbitral proceeding under Annex VII of the United Nations Convention on the Law of the Sea against China; and Ecuador, in a landmark arbitration proceeding against the US under the state-to-state arbitration provisions of the bilateral investment treaty between the two countries.

Constantinos has published widely in public international law, and co-edited Natural Resources and the Law of the Sea (Juris Publishing, 2017) and Canons of Construction and other Interpretive Principles in Public International Law (Kluwer, 2019), the first modern, free-standing analysis of canons and principles of interpretation beyond the 1969 Vienna Convention on the Law of Treaties. He has also lectured on treaty interpretation and international investment law and arbitration at the Graduate Institute of Geneva, the Melbourne School of Law and the Columbia Centre on Sustainable Investment’s executive training programme on investment arbitration. He holds the prestigious diploma in public international law of The Hague Academy of International Law (2006), which is awarded very sparingly. In 2018, Constantinos served as the director of studies in English for the public international law session of the Academy. In 2016, he was appointed to serve on the ICSID panel of conciliators by the Slovak Republic.

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