LAWYER PROFILE
Aisling O'Shea

Aisling O'Shea

USA 2026

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Ranked in 2 practice areas

About

Provided by Sullivan & Cromwell LLP

Practice Areas

Criminal defense, government and internal investigations and the FCPA

Career

Aisling O’Shea is a co-head of S&C’s FCPA and Anti-Corruption Group and a member of the Criminal Defense and Investigations Group and the Litigation Group. She has extensive experience in conducting internal investigations and defending clients in criminal and regulatory matters related to corruption, money laundering, securities fraud and other forms of financial fraud, tax evasion, and criminal antitrust. Ms. O’Shea advises clients on FCPA and anti-corruption issues, including FCPA-related transactional issues and corporate compliance programs and internal controls. She has represented financial institutions, multinational corporations and executives in investigations and enforcement actions by numerous government authorities, including the U.S. Department of Justice, the U.S. Securities and Exchange Commission, the U.S. Commodity Futures Trading Commission, various U.S. Attorney’s Offices, various bank regulators and the UK Financial Conduct Authority. Ms. O’Shea rejoined the Firm in 2017 after more than five years of service as a trial attorney in the FCPA Unit of the Fraud Section of the U.S. Department of Justice’s Criminal Division. Over the course of her tenure at the DOJ, Ms. O’Shea worked closely with every major U.S. Attorney’s Office and federal law enforcement agency, as well as in coordination with other government agencies, including the U.S. Securities and Exchange Commission, FinCEN and the Office of Foreign Assets Control, and numerous foreign law enforcement and regulatory authorities.

Professional Memberships

National Co-Chair, American Bar Association, White Collar Crime Committee

Personal

University of Virginia School of Law, J.D., 2003

Georgetown University, B.S. 2000

Chambers Review

Provided by Chambers

Chambers Guide to the USA

FCPA - USA - Nationwide

Band 3
Band 3

Individual Editorial

Aisling O'Shea is co-head of the FCPA and anticorruption group at Sullivan & Cromwell. She continues to impress with her well-regarded FCPA practice, acting for both major corporate entities and individual executives.

Litigation: White-Collar Crime & Government Investigations - District of Columbia

Band 4
Band 4

Individual Editorial

Aisling O'Shea co-leads Sullivan & Cromwell LLP's FCPA and anti-corruption team. She assists clients in resolving investigations brought by the DOJ.

Strengths

Provided by Chambers

  • Aisling does a great job advocating on behalf of her clients.

    FCPAChambers Guide to the USA
  • Aisling is a brilliant and hard-working attorney.

    FCPAChambers Guide to the USA
  • Aisling knows what she is doing; her instincts are right.

    FCPAChambers Guide to the USA
  • Aisling is an unbelievably skilled substantive lawyer. She is meticulous and extraordinarily smart.

    FCPAChambers Guide to the USA
  • Aisling is an attorney that is great in money laundering and fraud matters.

    Litigation: White-Collar Crime & Government InvestigationsChambers Guide to the USA

Ranked Individuals at Sullivan & Cromwell LLP (144)

California

California: Los Angeles & Surrounds

California: San Francisco, Silicon Valley & Surrou

District of Columbia

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