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Olga Dementyeva

Olga Dementyeva


Olga specialises in international commercial and investment arbitration. She is based in London and has previously spent time in our Moscow office. Olga is admitted as a solicitor in England and Wales.



Olga has experience acting for corporates and financial institutions in international disputes under various arbitration rules such as LCIA, SIAC and ICSID.

Olga's experience includes advising:

  • Standard Chartered Bank (Hong Kong) in an ICSID arbitration relating to a power station in Tanzania
  • a Russian bank in an LCIA arbitration relating to an English law governed share and purchase agreement on a sale of shares in a Ukrainian subsidiary, including defending emergency arbitration proceedings commenced by the counterparties under the LCIA rules
  • an Indonesian company in a SIAC arbitration concerning a contract to develop a coal mine in Indonesia, including defending a joinder application under the SIAC rules


Olga holds a Bachelor of Laws (with honours) and a Master of Laws (with honours) from MGIMO University (Moscow, Russia) with a focus on international Law and international financial Law, and an LLM from the University of Cambridge, with a focus on international investment law and international commercial litigation. Prior to joining Herbert Smith Freehills, Olga worked as a lawyer in Russia specialising in commercial law. Olga speaks English and Russian.