Marie A. McKiernan

Marie A. McKiernan

Associate | Litigation
617.646.8529 LinkedIn Profile


  • Cornell University, BS, Biology
  • Tufts University School of Medicine, MPH
  • Northeastern University School of Law, JD

Key Technologies

  • Semiconductors
  • Entertainment Systems
  • Software
  • Streaming Technology
  • Personal Computing Devices
  • Helmets
  • Consumer Health Products
  • Geolocation Devices

Practice Groups

Admitted to Practice

  • Massachusetts
  • US District Court, District of Massachusetts
  • US Court of Appeals for the Federal Circuit


  • Boston


Marie McKiernan focuses her practice on patent, trademark, trade secret, and copyright litigation, as well as post-grant proceedings.

Marie represents clients at all stages of litigation on intellectual property issues spanning a wide range of technologies, such as semiconductors, entertainment systems and software, streaming technology, personal computing devices and software, helmets, consumer health products, and geolocation devices.

Marie has experience litigating in multiple jurisdictions, including the Central District of California, the Northern District of California, the Southern District of California, the District of Colorado, the District of Delaware, the Northern District of Illinois, the District of Massachusetts, and the Western District of Texas.

In addition to her litigation practice, Marie actively participates in firm pro bono projects. She also frequently writes about timely litigation topics.

During law school, Marie participated in a co-op internship program, interning at the First Circuit Court of Appeals for the Honorable Norman H. Stahl and the US Food and Drug Administration’s Office of Chief Counsel. While completing her Masters at Tufts University, Marie did research for the Tufts Center for the Study of Drug Development, analyzing the development of personalized medicines.

After graduating from the dual-degree program, Marie interned with Wolf Greenfield for four months prior to beginning a judicial clerkship for the Honorable Mary Thomas Sullivan of the Massachusetts Appeals Court. Prior to joining the firm, Marie was an associate at a Boston-based litigation and insurance law firm.


Directly responsible for the preparation and presentation of trade secret misappropriation defenses, handling the direct examination of an important technical expert for a complex trade secret case concerning technology involving high speed wireless communications. Ultimately, the jury’s misappropriation verdict was favorable to the client, successfully mitigating claimed damages in the hundreds of millions to a one-dollar award.


  • Recognized on the inaugural Best Lawyers: Ones to Watch list by The Best Lawyers in America©
  • Repeatedly named to the list of Massachusetts Rising Stars by Super Lawyers


See All Publications
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2022 2021 2020 2018

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