Stephanie Gase


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Stephanie Gase heads Leader Berkon Colao & Silverstein’s Dallas office. She frequently appears in federal and state courts across the country on behalf of plaintiffs and defendants in all phases of complex commercial, environmental, and civil rights litigation.

Her industry acumen and deep scientific knowledge, combined with her analytical approach enables her to analyze and determine the best path forward for her clients. She enjoys crafting business and legal strategies and prides herself on her clear and direct communication style.

Business & Commercial Litigation

Stephanie’s experience spans a broad range of commercial issues, including contractual disputes, business torts, intellectual property matters, breach of fiduciary duties, fraud, and securities law violations.
Current and past matters:

  • Representation of chemical company client in multiweek jury trial in Delaware Superior Court for a half billion-dollar breach of contract litigation arising out of a failed corporate divestiture;
  • Secured an $8 million default judgment for securities fraud in the Central District of California;
  • Second-chaired trial in intentional infliction of emotional distress case where plaintiff sought over $50 million in damages from high-profile client in the entertainment industry;
  • First-chaired two-week trial after being engaged less than a week before trial and successfully limited damages to approximately $300,000 from plaintiff seeking over $110 million in economic and punitive damages;
  • Obtained voluntary dismissal of multimillion-dollar securities fraud and breach of contract claims against client after filing motion to dismiss;
  • Representation of corporation in prosecuting claims against its former law firm for breaches of fiduciary and contractual duties;
  • Representation of construction business in arbitration and state court action relating to a fraudulently induced business arrangement that forced client into bankruptcy;
  • Defense of business against Lanham Act claims relating to the sale of merchandise;
  • Defense of a publicly traded manufacturing corporation, including successfully setting aside a $4 million default judgment and vacating the underlying entry of default, in a federal action alleging breach of contract and state retailer protection statutes;
    Defense of UK-based marine electronics company in an ITC sec. 337 investigation brought by a Japanese competitor for the alleged infringement of patents related to radar, chart-plotting, mapping and cockpit multi-function display (MFD) technologies; obtained a favorable settlement and cross- license agreement; and
  • Successful negotiation of resolution of misappropriation of trade secret claim that resulted in consent judgment and permanent injunction in favor of Fortune 100 client.
Product Liability

Stephanie works on a wide range of environmental matters, including claims for nuisance, negligence, and trespass for personal injuries and property damage, as well as statutory claims under CERCLA, RCRA, and numerous state law environmental statutes. She has defended toxic tort and product liability lawsuits ranging from a single individual claimant to large class actions. Stephanie works with some of the leading experts in the fields of toxicology, epidemiology, remediation, engineering, and medicine. Current and past matters include:

  • Defense of Fortune-100 client in a natural resources damages (NRD) action brought by the Attorney General of Minnesota seeking to recover over $5 billion for the alleged damage to groundwater, surface water and soil caused by the alleged environmental release of Per- and Polyfluorinated Substances (PFAS);
  • Defense of Fortune-100 client in class actions in Alabama related to bodily injury and property damage allegedly caused by the environmental release of PFAS, such as PFOS and PFOA, from a manufacturing plant;
  • Defense of Fortune-100 client in environmental cost recovery actions under CERCLA, RCRA, and other environmental statutes in Minnesota and Alabama;
  • Defense of a major secondary lead producer in an environmental cost recovery action under CERCLA and other environmental statutes in Indiana; and
  • Defense of Fortune-100 client in class and individual actions in Colorado, Pennsylvania, New York, and Massachusetts related to bodily injury or property damage allegedly caused by the use and release of AFFF, a fire-fighting foam product.


University of Texas School of Law, J.D.

  • Order of the Barristers
  • Board of Advocates


Claremont McKenna College, B.A.


Professional Activities & Admissions

New York (2008)

Nebraska (2009)

Texas (2014)

U.S. District Court Southern District of New York (2010)

U.S. District Court Eastern District of New York (2012)

U.S. District Court Northern District of New York (2018)

U.S. District Court Northern District of Texas (2013)

U.S. District Court Western District of Texas (2020)

U.S. District Court Eastern District of Texas (2020)

U.S. District Court Southern District of Texas (2022)

State Bar of Texas

Dallas Bar Association

Texas Super Lawyers Rising Star (2017)

Practice Areas

Product Liability & Toxic Tort
Business and
Commercial Litigation
Employment Litigation
Intellectual Property
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