White Collar Defense & Government Investigations


Aisling O’Sullivan is an associate in the White Collar Defense & Government Investigations practice group, based in London. Her practice focuses on compliance, corporate crime, investigations and civil litigation, including asset tracing and recovery. Aisling is part of Brown Rudnick’s Supervising Solicitors team having relevant experience in the execution of search/delivery up orders.

Aisling provides advice and representation to corporates and individuals facing criminal and regulatory enforcement action. She has acted on investigations led by UK and international agencies into allegations of fraud, bribery and corruption, false accounting and money laundering. Aisling also has experience in requests for mutual legal assistance and extradition, relating to the investigation and prosecution of criminal offences abroad.

In the context of compliance, Aisling advises clients on financial crime and risk management. She has experience in conducting risk assessments and implementing compliance manuals, programs and policies to comply with a range of legal and regulatory obligations.

Aisling has particular experience in complex cross-border civil litigation, providing strategic advice to clients to trace and recover assets overseas.

Prior to joining Brown Rudnick, Aisling was an associate at a top tier US law firm, having previously trained and practiced at an international law firm. Before entering private practice, Aisling worked in the equity derivatives division of a US investment bank, focusing on equity swaps for hedge funds, asset managers and corporates.


University of Liverpool – Law LL.B (Hons)

Bar Admissions

Solicitor, England and Wales
Co-author, "GIR: The Practitioner’s Guide to Global Investigations 2021," Global Investigations Review (March 2021)
Co-author, Anti-Corruption 2021, Chambers & Partners (January 2021)
Co-author, Anti-Corruption 2019 Second Edition , Chambers & Partners (December 2019)
Arlidge and Parry on Fraud, Fifth Edition, Sweet & Maxwell
Code for Private Prosecutors, Private Prosecutors' Association
Professional Affiliations
Member, American Bar Association
Member, Female Fraud Forum
Member, Young Fraud Lawyers Association