Mark G. Hanchet

Litigation & Dispute Resolution, Financial Services Regulatory & Enforcement, Banking & Finance Litigation

"An excellent advocate who is very good with clients and has great expertise in matters with international aspects – Swiss matters in particular."
Chambers Global


Mark Hanchet is co-chair of Mayer Brown’s global Banking and Finance Litigation Group. His practice focuses on commercial litigation, arbitration, and regulatory enforcement, primarily involving financial institutions. Mark has experience in all phases of litigation, not only at the trial and appellate levels in federal and state courts, but also in various alternative dispute resolution forums.

Much of Mark’s financial services practice is international in nature; he routinely represents banks in connection with cross-border litigation and in proceedings seeking attachments and injunctions concerning assets located in the US and abroad. He also advises clients on a variety of issues relating to international dispute resolution, including forum selection, jurisdiction, service of process, and he is well-versed in navigating international discovery and judgment enforcement issues.


  • Mark served as lead litigation counsel on behalf of a prominent securities institution, successfully defending a case seeking damages in excess of $200 million, based on allegations that the prime broker client was instrumental in a hedge fund principal’s investor fraud.
  • In an action in which an international bank was accused of participating in a US fraud and violating the substantive laws of its home country resulting in alleged damages of over $47 million, Mark served as lead litigation counsel on behalf of the bank, obtaining dismissal of the complaint on forum non conveniens grounds.


  • Université de Strasbourg III, DEA
  • McGill University, BCL, LLB
    Editor, Law Journal
  • McGill University, BA


  • ニューヨーク州弁護士


  • US Court of Appeals for the District of Columbia Circuit
  • ニューヨーク州南部地区連邦地方裁判所
  • ニューヨーク州東部地区連邦地方裁判所
  • US Court of Appeals for the Second Circuit
  • US Court of Appeals for the Eleventh Circuit
  • US District Court for the Western District of New York
  • US Court of Appeals for the Seventh Circuit


  • フランス語