Matthew P. Mooney

Matthew Mooney Photo

Matt’s litigation practice spans complex civil and criminal matters in federal and state trial and appellate courts, and in arbitration proceedings.  He has trial experience and has represented clients in government investigations.  Recent matters have ranged from federal multidistrict and state-court litigation related to prescription opioids, antitrust actions, False Claims Act cases, commercial disputes, and criminal investigations.  In addition, Matt has represented clients pro bono in housing and land-use disputes, and in criminal appeals.

A native of the Washington, D.C. metropolitan area, Matt received a Bachelor of Arts, with distinction, in Economics and in Music from the University of Virginia, where he was inducted as a member of Phi Beta Kappa and of the Raven Society.  Matt graduated in the top 5 percent of his class and received a J.D., magna cum laude, from Duke University School of Law.  While at Duke Matt was a member of the Order of the Coif, served as an executive editor of the Duke Law Journal, and participated in the law school’s Appellate Litigation Clinic.  He joined Williams & Connolly after clerking for Judge Gerald B. Tjoflat of the Eleventh Circuit. Matt is a member of the firm’s Sustainability Committee.


Note, Between a Stone and a Hard Place: How the Hajj Can Help Restore The Spirit of Reasonable Accommodation to Title VII, 61 Duke L.J. 1029 (2013)

Representative Experience

Though all cases vary and none is predictive, Matt’s experience includes:

  • Serve as national counsel for a wholesale pharmaceutical distributor in over 1,000 cases consolidated in a federal MDL, as well as related state court litigations.
  • Represent a medical device manufacturer in litigation against a competitor and contractual counterparty, asserting unfair restraint of trade and antitrust claims and seeking injunctive relief and damages.
  • Represented Steward Health Care Systems, Inc. in an antitrust lawsuit challenging conduct aimed at preventing Steward from entering health care and insurance markets in Rhode Island.
  • Represented an oil-and-gas industry pioneer and his new companies, which were sued for over $450 million based on allegations of misappropriation of trade secrets, breach of fiduciary duty, and breach of contract.  The case settled for no payment from the firm’s clients, no admission of liability, and the plaintiff agreeing to pay millions in defense costs.
  • Successfully moved to dismiss qui tam complaint against Cardinal Health.
  • Secured a government declination to intervene against Cardinal Health and Edgepark Medical Supplies in qui tam litigation involving alleged violations of federal healthcare fraud and abuse laws.
  • Served as trial counsel in a land-use bench trial in Virginia circuit court.
  • Briefed and argued a criminal appeal in the Maryland Court of Special Appeals.




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