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 more than 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, 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, together with Franz T. Schwarz and Helmut Ortner, of Contractual Performance and COVID-19: An In-Depth Comparative Law Analysis, published by Wolters Kluwer.

In addition, 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 fourth 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.