Matthew J. Weldon

Matt is a globally recognized dual-qualified international arbitration practitioner and litigator. He is a New York lawyer as well as a solicitor in England & Wales, and his practice covers all aspects of international dispute resolution, including lead counsel advocacy in arbitrations and transnational litigations, and advising on public international law and enforcement proceedings. He is a practice group coordinator of the firm’s International Arbitration group and is consistently identified as a leader in his field, including by Chambers USA, Lexology Index (formerly Who’s Who Legal), and Best Lawyers^®. In Chambers USA (2022), client accolades included, “Matt is incredibly dedicated and resourceful,” “well versed with dispute resolution procedures,” and “his responsiveness is impressive.” One client in Chambers USA (2023) noted, “Matt has the uncanny ability to pick up complex matters quickly,” and another client in Chambers USA (2024) reported that he is “an astute tactician, a gifted technical lawyer, is great with clients and a popular and likeable team player.”   

Matt has represented sovereigns, multinationals, financial institutions, SOEs, and ultra-high-net-worth individuals across wide variety of industries, including LNG, construction, mining, oil & gas, renewables, life sciences, licensing, manufacturing, space, distribution, finance, real estate, technology, maritime, and aviation. He has also served as an arbitrator. He has represented clients in arbitrations governed by all major rules, including those of the ICC, AAA, JAMS, ICDR, HKIAC, SIAC, SCC, LCIA, and ICSID, as well as the UNCITRAL Arbitration Rules. Matt’s work is regularly featured in Global Arbitration Review, Investment Arbitration Reporter and Law360.