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 30 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 experience in mergers and acquisitions, joint ventures, and other corporate and shareholder disputes, as well as a range of oil and gas disputes and gas price review arbitrations.

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 leading book on damages in international dispute resolution, entitled The Guide to Damages in International Arbitration, published by Global Arbitration Review, now in its sixth edition. He is also the co-author of the book focusing on contractual issue regarding force majeure and COVID-19, entitled Contractual Performance and COVID-19: An In-Depth Comparative Law Analysis, published by Wolters Kluwer. He has also published and spoken on a variety of other international topics.

Mr. Trenor has taught courses on international arbitration at Georgetown University Law Center.