Mimi S. Dennis


Mimi S. Dennis


What Makes Mimi Deliberately Different

Mimi is an experienced trial lawyer whose unique background allows her to quickly jump in to work on complex cases and issues, immersing herself in the facts while formulating an effective litigation strategy. She has represented both plaintiffs and defendants in multiple jurisdictions. Mimi started her career as a trial attorney representing individuals in medical malpractice, products and premises liability cases, and now uses that experience to enhance her understanding of what works with juries. Her husband and three children all agree that she’s a formidable advocate.  

Overview Overview Experience Credentials

Mimi S. Dennis focuses her practice on product liability, environmental and toxic torts, class action and commercial litigation, as well as construction litigation and contract drafting and negotiation. Mimi is part of a team defending major oil companies in national cases related to alleged groundwater contamination due to the use of methyl tertiary butyl ether (MTBE), a gasoline additive. She also works on construction-related matters representing owners and contractors in litigation involving scheduling, delays and contractual disputes. Mimi also handles regulatory matters before various federal and state agencies, including FDA and EPA, and counsels food, beverage, medical and pharmaceutical industry clients on liability prevention and compliance matters. 

Presentations and Publications

  • “Contracts are Still King after Pa. Oil Drilling Case,” Law360 (February 2015).
  • “U.S. District Court in Pennsylvania Dismisses Majority of Water Well Contamination Claims Against Oil Drilling Company,” Toxic Tort and Environmental Law Update (January 2015).
  • “Supreme Court Rules CERCLA Does Not Preempt State Statute of Repose,” Toxic Tort and Environmental Law Update (June 2014).
  • “7th Circ. Reminder on Challenging a Class’s Predominance,” Law360 Expert Analysis (February 2014).
  • “Seventh Circuit Rejects Class Action Alleging Groundwater Contamination From Refinery Because Homeowners’ Claims Lack Commonality,” Toxic Tort and Environmental Law Update (January 2014).
  • “In Support of Learned Intermediary Doctrine” Law360 (October 2012).
  • Learned Intermediary Doctrine Applies to Failure-to-Warn Pharmaceutical Cases in Florida, Pharmaceutical Law Update (October 2012).


  • District of Columbia
  • Maryland
  • U.S. District Court (D.D.C.)
  • U.S. District Court (D. Md.)
  • U.S. Supreme Court


  • J.D. (2000) Georgetown University Law Center
  • Focus Issue Editor, Georgetown International Environmental Law Review
  • B.S.F.S. (1996) Georgetown University, cum laude


  • James T. Conlon Advocacy Award (March 2012)

Memberships and Affiliations

  • District of Columbia Bar Association
  • Maryland Bar Association
  • American Bar Association
  • Young Lawyers’ Forum of the Women’s Bar Association of Washington, D.C. — former co-chair 
  • ABA Forum on Construction Law
  • Washington Building Congress