• Georgetown University, B.S. (1996) cum laude
  • Georgetown University Law Center, J.D. (2000)


  • District of Columbia
  • Maryland

Mimi S. Dennis


Mimi S. Dennis represents leading national and global companies in commercial and product liability litigation and product regulatory counseling matters. Her clients include manufacturers, distributors, Class I and short line railroads, importers, and retailers.

With a focus on the pharmaceutical, rail, energy, and construction industries, Mimi defends clients in multidistrict proceedings, arbitrations, and other complex litigation. She also has first chair bench and jury trial experience. Mimi understands the nuances of the industries in which her clients operate, and she strives to help them balance litigation risks with business goals. Clients appreciate her hands-on approach and her sincere interest in developing strong personal relationships and a deep understanding of their businesses. Staying current on litigation issues, Mimi has published several articles on environmental and civil litigation matters, ranging from a discussion of class action certification to defenses in pharmaceutical failure-to-warn cases.

On the counseling side of her practice, Mimi helps clients limit risk and avoid liability and compliance issues. Representing clients in the food, beverage, chemical, medical device, and pharmaceutical industries, she handles regulatory matters before federal and state agencies, including FDA, EPA, and IRBs. Acting as an advisor to her clients, she carefully assesses risks, recommends actions, and counsels clients on contract formation, negotiation, and interpretation.

Mimi is a member of the firm’s Mass Tort, Product, and Consumer Litigation and Product Risk Management groups. She also has an active pro bono practice focused on providing legal services to immigrant women and girls who are survivors of gender-based violence. She has also served as a guardian ad litem in D.C. Superior Court.

Representative Matters


  • Defended a Class I rail carrier in an insurance subrogation case, in which the plaintiffs sought close to $20 million in damages. After the claims were significantly narrowed at summary judgment, the jury returned a verdict for the defendant following a week-long trial, rejecting all of the plaintiffs' claims. 
  • Representing a Class I rail carrier in multiple wrongful death proceedings, in which the plaintiffs seek more than $600 million in damages.


  • Defending a Fortune 20 health care services company in one of the largest multidistrict litigations in the nation, involving class action and personal injury claims of alleged pharmaceutical contamination and defects. 
  • Defended a Fortune 20 health care services company in a series of wrongful death and serious personal injury cases arising out of claims of alleged contamination of over-the-counter medication.


  • Defended a major oil company in a multidistrict litigation involving claims brought by municipalities, water districts, and state sovereigns across the country. 
  • Defended a major oil company in a consolidated gasoline oxygenate product liability litigation alleging injuries to water resources, including an action brought by the New Jersey Department of Environmental Protection seeking natural resource damages on a statewide basis for alleged impairment of groundwater resources. 
  • Defended a major oil company in an arbitration regarding LNAPL contamination at a petroleum storage terminal. Plaintiff’s claims exceeded $15 million; received a defense verdict after a week-long binding arbitration.

Architecture and Construction

  • Defended an architectural firm in a three-week arbitration regarding claims of defective design associated with the construction of a private museum and residence, resulting in a de minimus award for the property owner. 
  • Defended a joint venture engineering and construction company in a contract dispute associated with claims of defective fireproofing coating in a multi-billion-dollar liquid natural gas shipping terminal. 
  • Defended a construction company and its CFO against claims of fraud, misrepresentation, and breach of fiduciary duty.

Speeches & Presentations

  • "Product Liability, IP Infringement and Torts: Damages Compensation Across Jurisdictions," Webinar, SAA School of Management, University of Turin (April 20, 2021). Speaker: Mimi Dennis.


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