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Aisling O'Shea


Aisling O'Shea

Washington, D.C. +1-202-956-7500+1-202-956-7500 +1-202-293-6330+1-202-293-6330
[email protected]
As a co-head of the Firm’s FCPA and Anti-Corruption Group and a member of the Litigation Group, Aisling O’Shea focuses her practice on criminal defense, government investigations and the FCPA.

Before joining Sullivan & Cromwell, Ms. O’Shea spent five years as a trial attorney in the Fraud Section of the U.S. Department of Justice’s Criminal Division. Within the Fraud Section, Ms. O’Shea was a member of the Foreign Corrupt Practices Act Unit. In addition to FCPA matters, she focused on fraud matters in securities and healthcare, as well as investigating and prosecuting other complex economic crimes. She also worked with other federal agencies, including the U.S. Securities and Exchange Commission, FinCEN and the Office of Foreign Assets Control.

Ms. O’Shea often handled active and covert investigations, pre-trial and grand jury proceedings, witness interviews and negotiated plea agreements. For one of her highest-profile matters, she and the case team received the Homeland Security Investigations' 2016 Outstanding Financial Investigation award. This complex FCPA and money-laundering investigation involved corruption in a state-owned oil company in Venezuela and resulted in multiple guilty pleas and significant judgments.

Ms. O’Shea began her career as an associate at S&C, where she worked on complex financial investigations.

Selected Rankings and Recognitions
  • Recognized as one of North America’s Future Leaders in Investigations by Who’s Who Legal (2019, 2020) 
  • Listed in GIR’s Women in Investigations survey (2018)