Mackenzie A. Queenin

Associate vCard


  • Boston College (JD)
  • Providence College (BA, magna cum laude)

Bar Admissions

  • Massachusetts

Mackenzie represents clients in all aspects of litigation, with a special focus on internal investigations, state and federal government investigations and white collar defense.  She represents corporations, CEOs, directors, officers, and other individuals in all phases of investigations, regulatory enforcement proceedings, criminal prosecutions, and civil matters.

Before joining Mintz Levin, Mackenzie was a litigation associate in the Boston office of another international law firm.  During law school, she was an assistant district attorney with the Middlesex County District Attorney’s Office Criminal Prosecution Clinic and an intern with the Honorable Judge Selya at the U.S. Court of Appeals for the First Circuit.  Mackenzie also served as an Executive Articles editor on the Environmental Affairs Law Review.

Representative Matters

  • Defended depositions of individuals at the center of Massachusetts Attorney General’s investigation into daily fantasy sports contests, coordinated defense strategy in response to related federal investigation and class actions
  • Second-chaired administrative trial before the Massachusetts Economic Assistance Coordinating Council, drafted pre-filed direct testimony of witnesses, and prepared witnesses for cross-examination
  • Conducted internal investigation for alcohol distributor concerning illegal pay-to-play practices
  • Represented the board of directors of a Massachusetts non-profit in an investigation by the Attorney General
  • Represented a former employee of a public  company in parallel investigations by the SEC and USAO regarding violations of securities laws
  • Represented executives of specialized insurance company before federal grand jury in a Hobbs Act investigation
  • Drafted jury instructions, motions in limine and bench memoranda for federal trial involving civil RICO, fraudulent transfer, and conspiracy claims against electronics company
  • Sole associate in charge of conducting internal investigation for government agency based upon whistleblower report of fraud and threats of violence
  • Drafted motion to dismiss on behalf of public company in federal qui-tam action alleging Anti-Kickback and False Claims Act violations