"The best times in my career have been when I am fighting like hell to win justice for a hard-working person or their family, whether my client is an airline employee who has raised aviation-safety concerns, a finance professional who has stuck his neck out to stop fraud on investors, or a health-care executive who has refused to put profit before the needs of patients. Representing deserving individuals against wealthy corporations, whether in retaliation cases or in seeking financial rewards for reporting wrongdoing, is what energizes me more than anything else I do.  And I get to do it every day, which is why I love my job."

"Fighting against injustice and unfair business practices has been the main focus of my life for nearly forty years."

Recognized as a top whistleblower lawyer by Super Lawyers, Washingtonian Magazine and The Best Lawyers in America©David J. Marshall has successfully represented hundreds of whistleblowers and other employees in the financial, pharmaceutical, nuclear, aviation, railroad, healthcare, medical-device, retail and other industries. He is rated by Martindale-Hubbell as “AV Preeminent,” its highest possible peer-review rating.

A founding partner of Katz Banks Kumin, Mr. Marshall focuses his practice on a wide range of corporate whistleblower matters. He represents individuals in the whistleblower-reward programs administered by the Securities and Exchange Commission, the Internal Revenue Service and the Commodities Futures Trading Commission, and also represents plaintiffs or “relators” in qui tam lawsuits under the False Claims Act. Related to his representation of numerous whistleblowers before the SEC, Mr. Marshall publishes the annual SEC Whistleblower Practice Guide, a comprehensive handbook for whistleblowers and their lawyers.

Whistleblower-retaliation cases are also a central focus of Mr. Marshall’s work. He represents employees in claims arising under the whistleblower-protection provisions of the Sarbanes-Oxley Act, the Dodd-Frank Act, and numerous other federal and state laws when they have faced retaliation from their employers for reporting corporate wrongdoing.

Mr. Marshall represented thirteen flight attendants in a whistleblower-retaliation complaint against United Airlines resulting in a March 2016 settlement that reinstated them to their jobs. In 2014, he represented the whistleblower in a successful qui tam and retaliation lawsuit against a nursing-home company for fraudulently billing Medicare for unnecessary therapies, and in 2013 he represented the whistleblower in a qui tam lawsuit against the Gallup Organization that resulted in the recovery of $10.5 million in taxpayer funds. He has also achieved important victories in whistleblower cases involving entities such as the Architect of the Capitol (asbestos), Deutsche Bank (financial reporting), the Brown’s Ferry Nuclear Plant (nuclear safety), Lockheed Martin (defense procurement), and the Smithsonian National Air and Space Museum (asbestos).

Most recently, in April, 2021, a client of Mr. Marshall’s was awarded $3.2 million by the Securities and Exchange Commission for supplying critical information that led directly to a successful enforcement action against a large financial institution.

In addition to his work as a whistleblower lawyer, Mr. Marshall has successfully represented plaintiffs in sexual harassment, pregnancy discrimination and other workplace discrimination and retaliation cases, and has extensive experience in the negotiation of complex executive employment and separation contracts.

From 1981 to 1984 Mr. Marshall practiced as a staff attorney with the Political Rights Defense Fund, where he represented trade unionists and political activists nationwide in civil liberties, free speech, defamation, and political asylum litigation. He then worked as a steelworker, garment worker, freight railroad conductor, and refinery worker for 12 years, and was a rank-and-file union activist in some of the nation’s largest industries and unions. He returned to the full-time practice of law in Washington, D.C., in 1997.

Mr. Marshall has appeared in numerous national and local media. He speaks frequently at legal conferences as an expert on whistleblower law, has written extensively on whistleblower issues, and has provided comments and training to government agencies regarding developments in the nation’s whistleblower laws.

In addition to his legal practice, Mr. Marshall has served on a number of non-profit boards and committees, including:

  • The whistleblower-side co-chair of the American Bar Association Labor and Employment Section’s Subcommittee on the Sarbanes-Oxley Act of 2002; 
  • A member of the Board of Directors of the Public Justice Foundation, an organization that uses litigation to advance consumers’ rights, workers’ rights, public health and safety, and access to the courts;
  • A member of the steering committee of the Shelley Davis Memorial Fund of Farmworker Justice, the nation’s premier legal-advocacy group fighting for the rights of farmworkers;
  • An advisory committee member for the Government Accountability Project, a leading whistleblower-rights organization; and
  • A member of the host committee for the 2017 and 2018 celebrity-chef fundraisers for Tzedek DC, a new legal aid organization that provides legal services to low-income DC residents facing debt-collection lawsuits and other debt crises.

Mr. Marshall received his Bachelor of Arts degree, summa cum laude, from Emory University, attended the University of St. Andrews in Scotland as the first Bobby Jones Scholar, and earned his J.D. degree from Harvard Law School, where he graduated cum laude.

Honors & Awards
  • Washingtonian Magazine “Top Lawyer”, 2009–2020
  • Washington, D.C. “Super Lawyers,” 2010–2022
  • "The Best Lawyers in America," Civil Rights Law; Employment Law - Individuals; Litigation - Labor and Employment; Qui Tam Law, 2014-2021
  • Board of Directors Member, Public Justice Foundation, 2010–2013
  • Advisory Board Member, Government Accountability Project
  • Rated "AV Preeminent" by Martindale–Hubbell®
  • Lawdragon's "500 Leading Plaintiff Employment Lawyers," 2018-2022
Publications & Speaking Engagements
  • District of Columbia Bar Association
  • American Bar Association
  • Metropolitan Washington Employment Lawyers Association
  • National Employment Lawyers Association
  • B.A., Emory University, summa cum laude, 1977
  • J.D., Harvard Law School, cum laude, 1980
Bar Admissions
  • District of Columbia
  • Georgia

“David Marshall represented me in securing a very good outcome in a high–profile, hard–fought whistleblower case against a powerful government agency…”
–– Richard Pullman, an Exhibit Specialist for 27 years at the Smithsonian Air & Space who suffered retaliation after blowing the whistle on the presence of asbestos at the museum