John A. Trenor

John A. Trenor is a partner in the firm's Litigation/Controversy Department, and a member of the International Arbitration Practice Group. 

Mr. Trenor is an international dispute resolution lawyer with almost 25 years of experience in international arbitration and cross-border disputes. Mr. Trenor represents clients in international arbitrations sited around the world, in disputes governed by both civil law and common law, as well as public international law and international investment law. He has advised clients regarding commercial, investor-state and state-to-state arbitrations under virtually all of the major institutional as well as ad hoc rules, including ICC, LCIA, AAA, SCC, VIAC, UNCITRAL, ICSID, UNCITRAL and others.

Mr. Trenor has represented companies, States, State-owned entities, international organizations and individuals in a wide variety of disputes in the aviation, defense, energy, financial services, pharmaceuticals, technology, telecommunications and other industries. He has significant recent experience in a range of oil and gas disputes and gas price review arbitrations in particular.  

Mr. Trenor has frequently worked on high-profile, complex matters involving negotiation with various government departments and agencies in Europe, the United States and other jurisdictions. He also advises clients on cross-border regulatory matters.

He is the editor and co-author of the book The Guide to Damages in International Arbitration, published by Global Arbitration Review, now in its third edition. He has also published on a variety of other international topics.

Mr. Trenor teaches a course on international arbitration at Georgetown University Law Center.


  • Recommended in the 2008, 2009 and 2010 editions of Legal 500 UK and the 20162017 and 2018 editions of Legal 500 United States for dispute resolution: international arbitration

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  • Education

    • MPA, Princeton University, 1995

    • JD, University of Chicago Law School, 1995

      with honors Member, University of Chicago Law Review
    • BA, Cornell University, 1991

  • Admissions

    • District of Columbia

    • England and Wales, Registered Foreign Lawyer

    • New York

  • Languages

    • French