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Zachary O'Dell


Zachary's practice focuses on international dispute resolution, including commercial arbitration and transnational litigation and enforcement matters across Europe, North America, the Middle East, Latin America, and Asia.

He regularly acts as counsel to both claimants and respondents in a wide variety of commercial, post-M&A, construction, and energy arbitrations before and under the rules of the leading global arbitral institutions. He has also advised clients in connection with regulatory enforcement actions and white-collar criminal investigations.

Zachary has been recognised by Who’s Who Legal as a Future Leader in Arbitration since 2023 and by Handelsblatt / Best Lawyers Ones to Watch for International Arbitration in Germany since 2024. He is a U.S. national who also regularly lectures on U.S. written and oral advocacy at the Philipps University Marburg.


Representative matters

A German energy trader in an ICC arbitration seated in Geneva relating to short-term gas supply contracts governed by German law.

An Austrian company in a DIS arbitration seated in Frankfurt concerning a post-M&A dispute under German law.

A leading Latin American retailer in an ICC arbitration with New York seat under German law relating to a post-M&A dispute.

An Italian contractor in an ICC arbitration relating to the design and construction of a petrochemical plant in the Middle East.

Published Work

  • O’Dell, Z. (2021) “An Examination of the 2020 Revision of the IBA Rules of Evidence”, Munich: SchiedsVZ 6/2021 (Co-Author with Nettlau, H., and Hackstein, T.)
  • O’Dell, Z. (2022, Pierce, J.V.H. and Gunter P., eds.) “Why Arbitrate International IP Disputes” in The Guide to IP Arbitration, 2d ed., London: Global Arbitration Review (Co-Author with Herrington, D.H., and Mgaloblshvili, L.)
  • O’Dell, Z. (2019) “The Prague Rules and the Myth of a Civil Law Panacea”, New York: New York Dispute Resolution Lawyer (Co-Author with Emanuele, F., Santoro, C., and MacKinnon, A.D.)
  • O’Dell, Z. (2016) “The New York Convention and Insolvency”, São Paulo: Revista de Arbitragem e Mediação (Brazil) (Co-Author with Kreindler, R. and Rothe, N.)

Leadership Positions And Professional Affiliations

  • Listed Practitioner, Vienna International Arbitral Centre
  • Gender Champion, DIS-ERA Pledge Gender Champion Initiative (2020 – 2023)


  • Future Leaders, Who’s Who Legal Arbitration, 2024
  • Ones to Watch – International Arbitration, Handelsblatt / Best Lawyers, 2024
  • Future Leaders, Who’s Who Legal Arbitration, 2023



State of New York, USA, 2015


LL.M. (with honors), Northwestern University Pritzker School of Law, Chicago, IL, USA, 2014

J.D. (magna cum laude, Order of the Coif), Northwestern University Pritzker School of Law, Chicago, IL, USA, 2014

B.A. (summa cum laude), University of Maryland, College Park, MD, USA, 2007

A&O Shearman was formed on May 1, 2024 by the combination of Shearman & Sterling LLP and Allen & Overy LLP and their respective affiliates (the legacy firms). Any matters referred to above may include matters undertaken by one or more of the legacy firms rather than A&O Shearman.