Michael Heffernan is a Litigation & Dispute Resolution associate in Mayer Brown’s New York Office. His practice focuses on White Collar defense, Anti-Corruption and complex internal investigations. Michael has significant experience in investigations led by the US Department of Justice, the Securities and Exchange Commission, and other regulators. He focuses on FCPA/public corruption, commercial bribery, securities laws, US sanctions, antitrust, and money laundering. Michael also has experience counseling clients on compliance programs, compliance audits/due diligence arising out of acquisitions and joint ventures, and employee mobility matters.

Prior to joining Mayer Brown, Michael spent a decade as a Special Agent in the Federal Bureau of Investigation (FBI) where he investigated a wide range of federal crimes, to include those in the financial services. While serving within the FBI’s International Corruption Unit (ICU), he investigated numerous crimes related to the Foreign Corrupt Practices Act (FCPA), anti-money laundering and international antitrust. In addition, Michael led several multi-jurisdictional task forces conducting racketeering investigations into complex criminal enterprises and ultra-violent gangs.

Before working for the FBI, Michael worked as an equities analyst at a $70B Asset Management company. He also served as a Surface Warfare Officer in the United States Navy during the Iraq war.


Hamilton College, BA

Fordham University School of Law, JD, cum laude


  • New York