• New Jersey
  • Pennsylvania
  • U.S. District Court - Eastern District of Pennsylvania
  • U.S. District Court - New Jersey
  • United States Court of Appeals for the Third Circuit


  • Fellow of the Litigation Counsel of America
  • Third Circuit Bar Association
  • Philadelphia Bar Association
  • Philadelphia Chamber of Commerce
  • University of Notre Dame Alumni Association
  • Villanova University School of Law


  • Villanova University School of Law, JD, cum laude
  • University of Notre Dame, BA
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Mary Ann Mullaney


Philadelphia, PA v. +1.215.569.5598 f. +1.215.832.5598

Mary Ann Mullaney is an established trial and appellate attorney with considerable experience in complex litigation.  In federal and state courts, as well as in arbitrations and mediations, Ms. Mullaney has represented businesses, governmental entities and individuals in a wide variety of complicated disputes.

Commercial litigation is a major focus of Ms. Mullaney's practice, and she litigates claims of fraud, breach of contract, antitrust violations, unfair competition and related business torts.  But her complex litigation practice also encompasses such diverse areas as toxic tort, environmental contamination, voting rights, state legislative redistricting, professional malpractice, civil rights, product liability, employment, intellectual property, and corporate governance, among others. In the course of more than twenty years in practice, Ms. Mullaney has tried both jury and non-jury trials; additionally, she has briefed and argued numerous appeals.

Ms. Mullaney serves as Co-Chairperson of Blank Rome's Chemical Industry Group.

Ms. Mullaney regularly lectures and writes on legal developments of interest to members of, or followers of, the energy and chemical industries.  She has served as a guest lecturer at Temple University of School of Law and Widener University School of Law.  Additionally, Ms. Mullaney is a former adjunct instructor at Seton Hall University School of Law, where she taught appellate advocacy.

On July 15, 2008, Ms. Mullaney was inducted as a Fellow in the Litigation Counsel of America, a trial lawyer honorary society composed of less than one-half of one percent of American lawyers.


  • In federal district court, represented a natural gas well services company in toxic tort litigation in which the plaintiff claimed exposure to chemicals used in the hydraulic fracturing process had caused injury and necessitated medical monitoring. With two other trial lawyers, defended the company at trial on the only count as to which summary judgment had not been awarded. The jury rendered a defense verdict.
  • In federal appellate court, served as appellate counsel to a real estate developer. In that appeal, which challenged the trial court’s orders denying summary judgment and refusing to compel arbitration, the real estate developer prevailed.
  • In federal district court, tried, with three other trial lawyers, a $650 million fraudulent conveyance suit arising from a leading food and beverage company’s spin-off of various businesses, and achieved a defense verdict for that company on all claims, which verdict was upheld on appeal.
  • In a state suit initiated by a former licensee against its licensor, obtained dismissal of contract claims seeking $200 million; that victory served as the catalyst for favorable resolution of the licensor’s contemporaneous trademark and contract suit against its former licensee in federal court.
  • After a company in the trademark licensing business prevailed at trial, secured orders awarding it attorneys’ fees and costs.
  • In the representation of a state insurance commissioner in her capacity as liquidator of an insurance company, pursued malpractice litigation against that company’s outside actuaries and accountants, which litigation settled for $40 million.
  • In suits concerning the operation and management of a distressed city school district by a for-profit entity, successfully defended the commission established to run that district in trial and appellate courts.
  • Favorably resolved a putative Fair Labor Standards Act class action for restaurant owners.
  • For a national bank, secured dismissal in state and federal courts of virtually identical actions and asserting various constitutional and civil rights violations.
  • On behalf of a major chemical manufacturer, authored the brief opposing the motion for class certification in a suit alleging a gasoline additive had contaminated groundwater; the trial court denied certification and its order was affirmed on appeal.