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Eoin P. Beirne

Member / Co-chair, White Collar Defense and Government Investigations Practice

[email protected]

+1.617.348.1707

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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.
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viewpoints

Various COVID relief programs pumped $5 trillion into the economy, incredibly quickly, and with relatively minimal vetting. Within that enormous and necessary set of economic stimulus packages was likely the greatest amount of fraud committed on the government in the shortest amount of time in history. This article takes a look at the various issues facing government agencies as they attempt to investigate allegations of PPP fraud related to pandemic-era applications and the role of the Pandemic Response Accountability Committee in coordinating and overseeing these investigations.

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On February 24, 2021, DOJ’s Criminal Division Fraud Section published its annual year-end summary. The Fraud Section focuses on prosecuting white-collar crime. The report summarizes enforcement activity in the past year and discusses notable cases from the Fraud Section’s three litigation units: (1) the Health Care Fraud (HCF) Unit; (2) the Foreign Corrupt Practices Act (FCPA) Unit; and (3) the Market Integrity and Major Frauds (MIMF) Unit. In summarizing the Fraud Section’s main achievements from 2020, the report also provides valuable insights on what lies ahead for the Fraud Section in 2021. This post focuses on the health care enforcement portion of the Fraud Section’s report.
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On September 1, 2020, the Financial Crimes Network (“FinCEN”) issued a statement regarding various media outlets’ intent to publish Suspicious Activity Reports (“SARs”) and “other sensitive government documents”.
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Leading up to a webinar on July 15, 2020, we are publishing a blog series covering the risks of enforcement against companies that received COVID-19 relief funds under the CARES Act and strategies for mitigating those risks.  This third, and final, installment of our series discusses emerging and anticipated criminal enforcement involving COVID-19 relief programs.
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As discussed in our article recently published by Law360, criminal health care enforcement in 2019 was in many ways a continuation of 2018, with opioid-related enforcement continuing to be the clear top priority for the Department of Justice (DOJ), in addition to DOJ's sustained focus on prosecuting individuals and data-driven identification of health care fraud.  This post provides an overview of our article, which covers these issues and our expectations for 2020 in detail.
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Criminal healthcare enforcement in 2018 once again focused heavily on opioids, targeting manufacturers, prescribers, dispensers and those who contribute to the addiction epidemic, and on prosecution of individuals for a variety of offenses.  In addition, the DOJ announced some expected policy changes related to the way it investigates and prosecutes corporations as well as the restrictions placed on corporations after resolution of government charges.  We will address each of these issues in this post and will attempt to forecast what we expect to occur in the coming year.
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The Supreme Court ruled, at the end of June, that seizing cell-site location information—data that tracks cell phone users’ movements—constitutes a search under the Fourth Amendment.
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In both civil and criminal enforcement proceedings, 2017 was perhaps most notable for the cases brought against individual health care providers and small physician practice owners. 
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Continuing its annual tradition, the U.S. Department of Justice (“DOJ”) and the U.S. Department of Health and Human Services (“HHS”) announced last week the largest ever health care fraud enforcement action by the Medicare Fraud Strike Force.  As part of the national health care fraud takedown, the government charged 412 defendants with approximately $1.3 billion in alleged fraud.
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News & Press

Press Release Thumbnail Mintz

Mintz has earned top rankings in the 2025 edition of Legal 500 United States and Canada guides. The firm is recognized in 20 practice categories, and 78 of its attorneys are individually ranked in the guide, with several receiving recognition in more than one category. Additionally, two attorneys are featured in the "Hall of Fame," seven attorneys are named "Leading Lawyers," and five attorneys are recognized as a "Next Generation Lawyers."

Press Release Thumbnail Mintz

Chambers USA has recognized 43 of Mintz’s practices and 88 of its attorneys in its 2025 guide to the country’s leading law firms. Of those featured in the guide, 17 attorneys and seven practice areas were awarded Chambers’ highest ranking, Band 1. The firm expanded its rankings this year with three new practice area listings and 17 attorneys recognized for the first time or in additional categories.

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podcasts

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.

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Podcast Viewpoint Image

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.

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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

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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
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Eoin P. Beirne

Member / Co-chair, White Collar Defense and Government Investigations Practice

Boston