Bart Wasiak's practice focuses on representing sovereign States and private-sector clients in high-stakes international arbitration proceedings. To date, he has served as counsel in more than 20 investment-treaty arbitrations under the ICSID and UNCITRAL arbitration rules. He has advised clients in relation to a broad range of disputes, including in the energy, banking, mining and shipping sectors.

Mr. Wasiak is a Vice Chair (Policy) of the ABA International Arbitration Committee and an Associate Practitioner at the University of Nottingham Commercial Law Centre. He frequently speaks and writes on international law subjects, and is recognised for his expertise in both public international law and international arbitration.


  • Representing the Kingdom of Thailand in an ongoing UNCITRAL Rules arbitration relating to the mining sector.
  • Representing the Czech Republic in an ongoing investment-treaty arbitration relating to the renewable energy sector.
  • Representing the Republic of Korea in an ongoing ICSID arbitration relating to bank regulation and taxation matters.
  • Representing the Czech Republic in an ongoing ad hoc arbitration under the Switzerland-Czech Republic Bilateral Investment Treaty.
  • Representing the Republic of Bulgaria in an ongoing ICSID arbitration relating to electricity sectors.


Is it time for Investor State Mediation?
Speaker, Chartered Institute of Arbitrators (CIArb) webinar
Investor-State Mediation: Here At Last?
Moderator, American Bar Association International Law Section’s Fall Conference, Madrid, Spain
Young ICCA Skills Training Workshop: Cross-Examination
Speaker, Young ICCA workshop
ABA International Arbitration Skills Masterclass
The Tea on International Arbitration
Guest interviewer


The Legal 500 UK
Public International Law (2021-2023)
International Arbitration (2022-2023)


  • Legal Practice Course, BPP Law School
  • LLB, University of Nottingham and University of Texas
  • England and Wales
  • New York
  • Associate Practitioner, University of Nottingham Commercial Law Centre
  • Vice-Chair (Policy) of the International Arbitration Committee of the American Bar Association (ABA)
  • Fellow, Chartered Institute of Arbitrators (FCIArb)
  • Member, CEDR Investor-State Mediation Practitioner Advisory Group
  • Member, American Society of International Law (ASIL)
  • Member, International Council for Commercial Arbitration (ICCA)
  • Polish

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