Claire Guehenno focuses her practice on government and internal corporate investigations, and other criminal and enforcement matters. She has represented global corporations, financial institutions, and individuals in civil and criminal investigations before the Department of Justice, the Securities and Exchange Commission, and other domestic and foreign government authorities. Ms. Guehenno advises clients in times of crisis, leveraging experience across a wide range of matters, including matters related to the securities laws, Foreign Corrupt Practices Act, money laundering, environmental statutes, honest service fraud, the False Claims Act, and wire fraud. She has extensive international experience representing clients around the world and leveraging her language skills, including her native French.

In addition to her government-facing work, Ms. Guehenno has worked on numerous internal investigations, advising companies on compliance-related issues and best practices. She has worked with companies in a variety of sectors, including technology, financial services, mining and energy, transportation, health care, and cryptocurrency.

As part of her investigations practice, Ms. Guehenno manages multi-jurisdictional document collections and reviews, conducts witness interviews, and prepares external and internal presentations. She also represented an individual in a criminal honest services fraud trial in the Southern District of New York.

Ms. Guehenno also devotes significant time to her pro bono practice, focusing on immigration matters and representing indigent clients who need help navigating the complexities of our legal system.

Past Experience

Prior to joining WilmerHale, Ms. Guehenno clerked for the Honorable Richard J. Sullivan of the United States District Court for the Southern District of New York and the Honorable John M. Walker, Jr., of the United States Court of Appeals for the Second Circuit. 

While attending law school, Ms. Guehenno was co-editor-in-chief of the Harvard International Law Journal

From 2009 to 2011, Ms. Guehenno worked as a paralegal specialist in the Criminal Division of the United States Attorney's Office for the Southern District of New York.


  • Selected for inclusion in Best Lawyers: Ones to Watch for white collar criminal defense (20212024) and appellate law (2023–2024).

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  • Education

    • JD, Harvard Law School, 2014

      cum laude

      Co-Editor-in-Chief, Harvard International Law Journal, Board of Student Advisors

    • BA, Social Studies, Harvard College, 2009

      magna cum laude

  • Admissions

    • New York

  • Clerkships

    • The Hon. Richard J. Sullivan, US District Court for the Southern District of New York, 2015 - 2016

    • The Hon. John M. Walker Jr., US Court of Appeals for the Second Circuit, 2014 - 2015