Aceris Law is pleased to announce that William Kirtley has once again been recognized by the Lexology Index (formerly Who’s Who Legal) in the field of arbitration. This honour reaffirms his reputation as a leading practitioner in international arbitration, celebrated for his expertise, innovative approach, and unwavering commitment to excellence.
According to the publication:
Lexology Index: Arbitration 2025 is the culmination of months of research by Lexology Index and GAR. Our main Arbitration lawyers’ report identifies 1,626 prominent lawyers recommended for their expertise in resolving complex international disputes. […] Through nominations from peers and clients, the arbitrators, tribunal members, chairs, counsel and experts listed have been recognised by their peers and clients as the leading names in the field.
As a result, William Kirtley’s presence on this prestigious list year after year underscores the high regard with which he is viewed in the field of arbitration as well as his ability to manage the complexities of international disputes.
A Consistent Record of Excellence
William Kirtley is a distinguished international arbitration lawyer and the managing partner of Aceris Law, a global boutique law firm specializing in international arbitration. With a robust educational background, including degrees from Harvard, Columbia, and the Sorbonne, he has over two decades of experience in high-level international commercial arbitration, investor-State disputes and construction arbitration.
According to peers and clients, “William has extensive knowledge and experience in the field“, “an outstanding personality“, “an efficient working style“, and “strong strategical, analytical and negotiation skills“.
Kirtley has been involved in over 200 international arbitrations, including some of the largest cases to date. His work spans five continents and covers a range of arbitration rules, including those of UNCITRAL, ICC, ICSID, LCIA, and many others. He has held roles as both counsel and arbitrator and is highly regarded for his expertise in complex international disputes.
Kirtley founded Aceris Law in 2014 to offer the highest-quality arbitration legal representation at more reasonable rates. He had observed that the practice of charging excessive fees, often for questionable work, was detrimental to the credibility and integrity of the arbitration process, undermining its reputation as the leading international dispute resolution mechanism. Over the past decade, Aceris Law’s lawyers have represented clients in hundreds of international arbitrations, earning a reputation for their unwavering commitment to client interests and an exceptional track record. Kirtley’s team is young, dynamic, and relentlessly focused on achieving the best possible outcomes for clients. Its accessibility and responsiveness are unmatched, maintaining a highly cooperative and transparent working relationship throughout the process.
As arbitration continues to evolve, so too does William Kirtley’s practice. His recognition by the Lexology Index is a testament to his ability to adapt, innovate, and lead in this dynamic field. Whether addressing emerging legal issues or staying at the forefront of new technologies to enhance efficiency, boost productivity, and provide greater benefits to clients, William remains a leader in the arbitration world.
