Eoin P. Beirne
Member / Co-chair, White Collar Defense and Government Investigations Practice
+1.617.348.1707
Eóin is a nationally recognized trial lawyer and career defense lawyer who represents companies, executives, public officials, and board committees in their most sensitive government investigations and high-stakes criminal and civil enforcement matters. Co-chair of Mintz’s White Collar Defense and Government Investigations Practice, Eóin is known for achieving quiet, early-stage resolutions with the DOJ, SEC, state attorneys general, and other enforcement agencies — and for winning when cases must be tried.
Eóin has secured acquittals, dismissals, and declinations in complex cases involving allegations of securities fraud, health care fraud, government contracting fraud, public corruption, insider trading, FCPA violations, and False Claims Act liability. He regularly advises corporate boards and special committees on internal investigations, whistleblower allegations, and crisis-driven compliance matters, and has deep experience guiding clients through parallel criminal, civil, and regulatory inquiries. Eóin’s investigations have helped clients avoid government charges and reputational damage, negotiate favorable resolutions, and get back to business.
When a negotiated resolution is not possible, Eóin is a veteran courtroom advocate who served as trial counsel in the only full trial acquittal obtained in the nationwide “Varsity Blues” prosecution. Recognized by Chambers USA and named a Litigation Trailblazer by the National Law Journal, he has represented clients in some of the largest and highest-visibility investigations in recent years, including matters involving the DOJ Special Counsel, the global 1MDB investigation, federal cybercrime inquiries, NTSB investigations, and postincident infrastructure failures.
In addition to his work for clients, Eoin serves a faculty member of the Trial Advocacy program at Harvard Law School.
Eóin is a nationally recognized trial lawyer and career defense lawyer who represents companies, executives, public officials, and board committees in their most sensitive government investigations and high-stakes criminal and civil enforcement matters. Co-chair of Mintz’s White Collar Defense and Government Investigations Practice, Eóin is known for achieving quiet, early-stage resolutions with the DOJ, SEC, state attorneys general, and other enforcement agencies — and for winning when cases must be tried.
Experience
Representative Matters
- Led defense team securing the lone trial acquittal of a charged parent in the “Varsity Blues” federal admissions cases.
- Obtained declination for a top executive in the multibillion-dollar global 1MDB investigation after strategic advocacy to DOJ.
- Represented individual recorded on a wire by a cooperating witness in high-profile insider trading conspiracy case involving Fortune 100 companies; no charges were brought following presentation to the DOJ.
- Avoided all charges for a federal defense contractor following voluntary self-disclosure of potential FCA and criminal issues.
- Represented multiple individuals and entities in DOJ Special Counsel’s post-2020 election investigations with no charges brought.
- Successfully defended a large ophthalmology practice that provided trans-cranial doppler ultrasounds (TCDs) in alleged kickback investigation, resulting in no charges being brought.
- Convinced DOJ not to charge medical practices, laboratories, and government contractors in numerous FCA, Anti-Kickback, and fraud matters.
- Trial counsel in a high-profile criminal fraud trial in the Southern District of New York.
- Achieved complete trial dismissal of federal wire and mail fraud charges against an individual in a large-scale fraud case in the District of Massachusetts.
- Represented corporations and executives in SEC and DOJ insider trading investigations, securing declinations.
- Guided a public utility contractor through NTSB and federal grand jury investigations arising from the Merrimack Valley explosions — with no charges filed.
- Conducted numerous board-level internal investigations following whistleblower complaints, CIDs, subpoenas, and cyber incidents.
- Represented national and locally elected officials in Congressional and grand jury investigations.
viewpoints
“False” Sense of Security: DOJ Announces False Claims Act Settlements Related to Failure to Comply with Cybersecurity Requirements
August 4, 2025 | Blog | By Eoin Beirne, Karen Lovitch , Keshav Ahuja
On July 31, 2025, the United States Department of Justice (DOJ) announced a pair of settlements with companies accused of having violated the False Claims Act (FCA) by falsely representing their compliance with certain cybersecurity requirements applicable to federal contractors. These two settlements highlight key aspects of DOJ’s enforcement priorities: (1) DOJ’s strong focus on enforcing the FCA in the cybersecurity space, and (2) DOJ’s willingness to reward companies that self-disclose violations. All government contractors certifying compliance with regulatory and contractual requirements must stay vigilant and take the steps needed to comply.
Dodging Duties: The Ninth Circuit Affirms an Expansive Application of the False Claims Act Consistent with Trump Administration Priorities to Target and Combat Customs Fraud and Tariff Evasion
July 2, 2025 | Blog | By Eoin Beirne, Nick A. LaPalme, Keshav Ahuja
On June 23, 2025, the United States Court of Appeals for the Ninth Circuit affirmed a district court judgment in a case in which the jury found the defendant knowingly made false statements on customs forms to avoid paying duties on Chinese imports. The decision affirms an expansive application of the False Claims Act (“FCA”) that plays directly into the hands of the Trump administration’s evolving enforcement priorities.
Webinar Recording: DOJ Enforcement in the Trump Administration: Priorities, Shifts, and Legal Impacts
June 18, 2025 | Webinar | By Eoin Beirne, Erek Barron, Karen Lovitch , Jennifer Rubin
This in-depth webinar examines DOJ’s enforcement priorities and topics such as recent False Claims Act settlements (which go beyond health care fraud), enforcement risks and best practices, and whistleblower risks and protections from an employment law perspective.
Voluntary Self-Disclosure and Whistleblower Awards Initiatives Are Alive and Well in 2025: DOJ Issues White-Collar Enforcement Priorities for the New Administration
May 22, 2025 | Advisory | By Eoin Beirne, Nick A. LaPalme, Andrew Tucker Bobbitt
The first 120 days of the Trump administration have been characterized by dramatic changes in the realm of white-collar enforcement. Recently issued memoranda and policy guidance from DOJ contains critical details regarding the new administration’s enforcement priorities.
Health Care Enforcement Trends & 2025 Outlook
January 17, 2025 | Blog | By Karen Lovitch , Samantha Kingsbury, Keshav Ahuja, Eoin Beirne, Grady Campion, Daniel Cody, Tara E. Dwyer, Laurence Freedman, Hope Foster, Jane Haviland, Nicole Henry, Caitie Hill, Robert Kidwell, Nick A. LaPalme, Scott Lashway, Kevin McGinty, Payton Thornton, Matthew Stein, Rachel Yount
Our 2025 edition of EnforceMintz reflects on health care enforcement trends, predicts how health care enforcement may evolve, and offers practical guidance about what these trends and predictions mean for health care providers, payors, and other stakeholders.
EnforceMintz — Novel Criminal Charges and Emerging Civil Trends from Opioid Enforcement in 2024
January 16, 2025 | Blog | By Eoin Beirne, Grady Campion
As opioid-related enforcement efforts continued across the opioid supply chain in 2024, the government pursued criminal charges in two matters that resulted in significant settlements. Additionally, a number of recent cases against pharmacies involve a common theory of liability based on the Controlled Substances Act, which served as the basis for civil liability under the False Claims Act.
EnforceMintz – DOJ Policy Developments in 2024 Seek to Motivate More Voluntary Self-Disclosures
January 16, 2025 | Blog | By Eoin Beirne, Nick A. LaPalme, Karen Lovitch
Over the past two years, the Department of Justice has actively incentivized companies to voluntarily self-disclose potential civil and criminal violations. This article explores the DOJ’s new policies, the benefits of self-disclosure, and the challenges companies face in complying with these initiatives.
The Murky Waters of Wash Trading Digital Assets – DOJ Charges 18 Individuals and Entities
October 15, 2024 | Blog | By Eoin Beirne, Cory S. Flashner, Edmund P. Daley
The United States Attorney’s Office for the District of Massachusetts recently unsealed what it described as the “first-ever criminal charges against financial services firms for market manipulation and ‘wash trading’ in the cryptocurrency industry.”
The New Private Equity Post-Acquisition Paradigm
October 1, 2024 | Alert | By Eoin Beirne
Read about DOJ recent scrutiny of private equity deals, its initiatives aimed at increasing acquirer oversight of M&A transactions, and best practices for private equity sponsors in the current enforcement landscape.
DOJ Issues its Highly Anticipated Whistleblower Awards Pilot Program
August 15, 2024 | Blog | By Eoin Beirne, Karen Lovitch , Brian Dunphy, Nick A. LaPalme
In March 2024, at the American Bar Association’s 39th National Institute on White Collar Crime, Deputy Attorney General (“DAG”) Lisa Monaco announced that the Department of Justice (“DOJ” or the “Department”) intended to create a new whistleblower rewards pilot program.
News & Press
FCA Bar Eager to Scrutinize 11th Circ. Qui Tam Debate
December 9, 2025|
Now 'Back to Stability,' Mass. US Atty Office Set to Ramp Up
November 15, 2024|
Private Equity: How to Stay Out of the DOJ’s Cross-Hairs
October 10, 2024|
4 Years On, Unraveling The Lessons Of 'Varsity Blues'
September 27, 2023|
Thirteen Mintz Members Named To Lawdragon 500 Leading Litigators List
September 11, 2023|
Fencers' Creds Foiled Harvard Bribe Case, Attys Say
December 22, 2022|
Twenty-Eight Mintz Attorneys Named To Boston Magazine’s Top Lawyers List
November 22, 2022|
The Government’s Long Game for Investigating COVID-19 Relief Fraud
November 11, 2022|
Why A 76-Year-Old Top Court Case Could Undo 'Varsity Blues'
November 10, 2022|
New Mass. AG Campbell Inherits 'Bold' Litigation Mandate
November 9, 2022|
2019 Trends In DOJ Health Care Enforcement
January 13, 2020|
2017 Health Care Enforcement Review: Final Thoughts
January 19, 2018|
Mintz Elevates Eight Attorneys to Members of the Firm
May 13, 2014|
podcasts
Health Law Diagnosed – EnforceMintz – Part 2: DOJ Regulatory and Policy Update
April 25, 2023 | Podcast | By Bridgette Keller, Eoin Beirne, Karen Lovitch , Brian Dunphy
In this episode, Health Care Enforcement Defense specialists Eoin Beirne, Karen Lovitch, and Brian Dunphy discuss key regulatory and policy updates issued by the DOJ and their potential impact on False Claims Act cases, from self-disclosure to privacy regulations.
Health Law Diagnosed – EnforceMintz: Analyzing Health Care False Claims Act Cases
April 18, 2023 | Podcast | By Bridgette Keller, Karen Lovitch , Brian Dunphy, Eoin Beirne
Bridgette Keller speaks with Karen Lovitch, Brian Dunphy, and Eoin Beirne about the Mintz Health Care Enforcement Defense Practice’s recent edition of the EnforceMintz newsletter, Analyzing Health Care False Claims Act Cases, and key health care enforcement trends.
Events & Speaking
DOJ Fraud and Health Care Enforcement: Latest Priorities, Trends, and Compliance Considerations
Virtual Event
Publications
Eóin is a nationally recognized trial lawyer and career defense lawyer who represents companies, executives, public officials, and board committees in their most sensitive government investigations and high-stakes criminal and civil enforcement matters. Co-chair of Mintz’s White Collar Defense and Government Investigations Practice, Eóin is known for achieving quiet, early-stage resolutions with the DOJ, SEC, state attorneys general, and other enforcement agencies — and for winning when cases must be tried.
Recognition & Awards
Chambers USA: Massachusetts – Litigation: White Collar Crime and Government Investigations (2022 – 2026)
Lawdragon: 500 Leading Litigators in America (2022 – 2027)
Lawdragon: 500 Leading Global Investigations Lawyers (2026)
Best Lawyers in America: Criminal Defense: White Collar (2021 – 2027)
National Law Journal: 2022 Litigation Trailblazer
Fellow, Litigation Counsel of America, The Trial Lawyer Honorary Society
Massachusetts Super Lawyers: Criminal Defense: White Collar (2017 – 2025)
Boston Magazine: Top Lawyers – Criminal Defense: White Collar (2021 – 2022, 2025)
Legal 500: Recommended Lawyer – Corporate Investigations and White-Collar Criminal Defense (2026)
Mondaq: Thought Leadership Award Winner, Autumn 2025
Eóin is a nationally recognized trial lawyer and career defense lawyer who represents companies, executives, public officials, and board committees in their most sensitive government investigations and high-stakes criminal and civil enforcement matters. Co-chair of Mintz’s White Collar Defense and Government Investigations Practice, Eóin is known for achieving quiet, early-stage resolutions with the DOJ, SEC, state attorneys general, and other enforcement agencies — and for winning when cases must be tried.
Involvement
- Member, Boston Bar Association
- Member, Federal Bar Association
- Past Board Member, Massachusetts Association of Criminal Defense Lawyers (MACDL)
- Past Member, American Bar Association’s Public Corruption and Extortion Subcommittee and the Criminal E-Discovery Taskforce
