WilmerHale has been involved in hundreds of international arbitration proceedings in recent years. We have successfully represented clients in a number of the largest institutional arbitrations and several of the most significant ad hoc arbitrations to arise in the past decade. We pride ourselves on consistently achieving our clients’ objectives through efficient staffing and the use of in-house know-how and precedents.

With team members based in London, New York, Washington DC, Boston, and Berlin, we advise clients on commercial, investor-state, and state-to-state arbitrations under nearly all major institutional and ad hoc rules, across both common law and civil law jurisdictions. We have handled disputes under all leading arbitration rules, including International Chamber of Commerce (ICC), American Arbitration Association (AAA), London Court of International Arbitration (LCIA), International Centre for Settlement of Investment Disputes (ICSID), and UNCITRAL rules, and under many regional rules around the world. We also have extensive experience with other forms of institutional arbitration and ad hoc arbitrations, including arbitration of public international law issues.

Our lawyers are adept at handling all aspects of the arbitral process, including trial advocacy and enforcement. In appropriate cases, our lawyers also serve as arbitrators, mediators and expert witnesses on issues of international dispute resolution.

Experience Across Industries, Issues and Geographies

Many members of our team are dedicated exclusively to international arbitration and have notable experience in industries such as aviation, construction, defense, energy and natural resources (including gas price review arbitrations), financial services, manufacturing, pharmaceuticals, technology, and telecommunications. Our lawyers have also worked extensively on corporate and shareholder disputes arising from mergers and acquisitions, joint ventures, and licensing and distribution agreements.

We have been involved in arbitrations seated around the globe, including in the United States (various situses), London, Geneva, Zurich, Lausanne, Stockholm, Vienna, Paris, and Singapore, and have handled disputes governed by the laws of dozens of civil law and common law legal systems worldwide.

A Reputation for Quality

Our practice is known for providing high-quality representation. One Chambers USA 2026 respondent commented that “WilmerHale stands out for its combination of world-class legal intellect with tactical agility,” noting that our team offers “strategic direction,” “robust advocacy, “and “a sophisticated understanding of cross-cultural dynamics.” Another stated that “It's a real pleasure to work with WilmerHale, all of them.” U.S. News - Best Lawyers® 2026 cites a client as saying “WilmerHale’s international arbitration practice is second-to-none. Their team is intelligent, efficient and a pleasure to work with, and they get excellent results.”

Efficiency Based on Precedent

We maintain a comprehensive database of know-how and documentation under all leading institutional rules and national laws. This includes model submissions, precedents, and research materials on both procedural and substantive issues.