Olesya Prantyuk


Future Leader - Arbitration 2024
Expert Information
Qualifications FCCA
BE Hons
Professional Memberships FCCA, YIAG, ICCA, RAI, AW
Industries Aerospace and Defence, Financial Services, Technology, Media and Telecoms
Regional Experience Africa, Asia, Europe, Middle East
Expert Highlights
  • Chartered Certified Accountant.
  • Appointed as the named expert on 4 occasions, both in High Court litigation and international arbitration.
  • Acted as assistant to the named expert on more than 40 occasions.
  • Focus on emerging markets, including Central and Eastern Europe.
  • Experienced in both commercial disputes and high value investigations.
  • Involved in high-profile cases with values in excess of $2 billion.
  • Trilingual in English, Russian and Ukrainian.

Olesya Prantyuk is a Chartered Certified Accountant with more than 15 years of experience in finance and accounting, including over 9 years of experience in disputes. She has been appointed as an expert on 4 occasions (one High Court litigation and three commercial arbitrations) and has assisted the named expert on more than 40 occasions in matters of forensic accounting and commercial damages.

“Olesya is a profound expert in her area” “She has a pragmatic approach and understands her clients’ needs” “She is a quick thinker, and is very responsive”

Olesya has worked on matters in various forums, from litigations in the UK and Swiss courts, to investor-state and commercial arbitrations on behalf of claimants and defendants (LCIA, ICSID, ICC, SIAC, ADCCAC, SAC, AAA).  Her high-profile cases include a freezing order application with values in excess of $2 billion and a valuation of a financial institution of $1.3 billion.  Her cases as the named expert involved space technology, TMT, and financial services sector, with the damages up to $35 million.

Olesya’s experience in forensic accounting covers a wide array of matters across the aerospace & defence, oil and gas, financial services, logistics, retail, mining, precious metals, and energy sectors, ranging in size between $10 million and $2 billion.  She also has a particular interest in aerospace and technology that has the capacity to improve the lives of people.

As a native Ukrainian and Russian speaker, Olesya has been involved in matters regarding assets in Central Europe, Eastern Europe, and the Middle East; and in particular, in matters related to high-net-worth individuals across the EMEA region.  In addition to dispute work, Olesya has also led fraud investigation matters and dealt with the allegations of corruption.

Prior to specialising in disputes, Olesya worked in audit on engagements involving financial institutions, power and utilities, transportation, and retail companies. Olesya has also worked on cases involving the records prepared under the IFRS, UK GAAP, US GAAP, local Ukrainian and Russian accounting standards.

Olesya has completed an advanced professional award in expert witness evidence and is a fellow member of the Association of Chartered Certified Accountants. She is also a member of the Young International Arbitration Group (YIAG), the Young International Council for Commercial Arbitration (ICCA), the Rising Arbitrators Initiative (RAI), and Arbitral Women (AW).

Contact Olesya
Location: London, UK

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