Brian J. Hennigan

Brian J. Hennigan

Los Angeles, California

Brian Hennigan is Managing Partner at Hueston Hennigan LLP. He is a Fellow in the American College of Trial Lawyers.

For the past twenty years, Mr. Hennigan has specialized in complex litigation, with an emphasis on white collar criminal defense. Over that time period, he has successfully represented individuals and corporations facing a wide array of challenges presented by federal prosecutors and investigating agencies. More recent representations have included the successful representations of individuals facing allegations under the Foreign Corrupt Practices Act, the Securities and Exchange Commission Act, the Internal Revenue Code, and the Sherman Act. In addition to corporate representations, Mr. Hennigan has represented several professional athletes, leaders of various religious denominations, doctors, lawyers, accountants, and business executives in federal criminal matters.

His skills at representing individuals in white collar investigations have garnered praise from numerous sources. Chambers USA has ranked Mr. Hennigan in Band One every year since 2008 in the White Collar Crime & Government Investigations category and lauded him as a "creative thinker and problem solver" and as a "terrific attorney because of his great ability to communicate with judges and juries." Mr. Hennigan has the highest Martindale-Hubbell rating, a peer review rank of AV-Preeminent. He has consistently been recognized as one of the top white collar criminal defense lawyers by a variety of sources and was named the Los Angeles "Lawyer of the Year" in White Collar Criminal Defense by The Best Lawyers in America.

Mr. Hennigan has also established himself as a premier trial attorney in civil actions. His extensive civil experience includes securities and class action matters, patent licensing cases, antitrust cases, contracts cases, and unfair business practice cases. He has also successfully represented law firms and individual lawyers on malpractice claims with regard to complex tax matters.

Before co-founding Hueston Hennigan LLP, Mr. Hennigan was a partner at Irell & Manella LLP. Prior to that, he served as an Assistant United States Attorney in the Central District of California, where he was an Assistant Division Chief for the Criminal Division of that Office. In that position, he conducted numerous grand jury investigations, was lead trial counsel in over thirty trials, and successfully represented the United States in numerous appeals before the Ninth Circuit Court of Appeals. For his work in the U.S. Attorney's Office, Mr. Hennigan received commendations from the U.S. Department of Justice and numerous other government agencies.

Areas of Practice

  • Complex Trial Litigation
  • White Collar Criminal Defense

Bar Admissions

  • Illinois
  • California


  • Northwestern University School of Law, Chicago, Illinois
    • J.D. cum laude
  • Northwestern University
    • B.A.