Mark Taticchi represents and counsels clients in appellate litigation, complex civil disputes and class action cases. A frequent author on consumer contracts, class actions and other legal issues, Mark has prepared successful petitions to the Pennsylvania State Supreme Court, persuaded the U.S. Courts of Appeals on behalf of clients, and drafted numerous cert petitions and amicus briefs in cases before the U.S. Supreme Court.

Appellate Litigation

Mark has extensive experience in appellate litigation, including questions of standing, jurisdiction, preemption, arbitrability and class certification. In addition to briefing and arguing direct appeals, Mark regularly assists clients with petitions for discretionary appellate review, including petitions for interlocutory review of a trial-court decision, requests for rehearing of an unfavorable ruling at an intermediate appellate court, and petitions for review in state and federal courts of last resort.

Mark clerked for Associate Justice Anthony M. Kennedy of the Supreme Court of the United States and the Honorable Sandra S. Ikuta of the United States Court of Appeals for the Ninth Circuit.

Commercial Litigation, Class Action

Mark counsels clients on various consumer-fraud, deceptive trade practices and unfair-competition matters arising under both state and federal law. He also possesses extensive experience with aggregate litigation, including both mass torts and class actions. Mark regularly assists clients in navigating both the procedural requirements of class certification and the unique strategic considerations that accompany aggregate litigation.

Representative Experience

  • Successfully represented an energy company in litigation concerning a Minnesota statute giving existing owners of electric transmission facilities a right of first refusal to build new transmission lines that will connect to their existing facilities. After our client was selected to build a new transmission line in Minnesota, a losing bidder brought suit, arguing that the statute violated the Dormant Commerce Clause. The district court ruled in our client's favor, and the U.S. Court of Appeals for the Eighth Circuit affirmed. The challenger then sought certiorari, but the U.S. Supreme Court agreed with our arguments against further review and denied the petition without comment.
  • Represented a nonprofit organization in a successful appeal to the Supreme Court of Pennsylvania, which vacated an intermediate appellate decision that had allowed the Pennsylvania State Police to withhold most of the provisions of its social media monitoring policy under Pennsylvania's Right to Know Law. Following remand to the intermediate appellate court and another unfavorable decision from that court, our team persuaded the Supreme Court of Pennsylvania to once again take the case.
  • Drafted a successful petition for a panel rehearing of an unpublished opinion construing an international treaty and the implementing federal statute. Our petition persuaded the Third Circuit panel to flip from a unanimous decision against our position to a unanimous, published opinion in our client's favor.
  • Prepared the briefs in a direct appeal to the Second Circuit from an adverse summary judgment decision. We persuaded the Court of Appeals that the district court had applied the wrong standard in assessing the evidence at summary judgment and secured a remand for trial on our client's claims.
  • Successfully briefed and argued before the Pennsylvania Superior Court for affirmance of a trial court's decision denying the appellants' eve-of-trial demand for arbitration of our clients' breach of contract and breach of fiduciary duty claims under Pennsylvania law.
Analyzing the Impacts of the U.S. Supreme Court’s Decision to End Affirmative Action
Analyzing the Impacts of the U.S. Supreme Court’s Decision to End Affirmative Action

Related Legal Services


Bar Admissions

District of Columbia
New York

Court Admissions

U.S. Court of Appeals for the Second Circuit
U.S. Court of Appeals for the Third Circuit
U.S. Court of Appeals for the Sixth Circuit
U.S. Court of Appeals for the Seventh Circuit
U.S. District Court for the Eastern District of New York
U.S. District Court for the Eastern District of Pennsylvania


U. S. Court of Appeals for the Ninth Circuit, Hon. Sandra S. Ikuta, 2011-2012
United States Supreme Court, Hon. Anthony M. Kennedy, 2010-2011


George Washington University Law School
J.D. Order of the Coif, The George Washington Law Review - Editor-in-Chief (2010)

Pennsylvania State University
B.A. (2007)

Insights & Events

Other Perspectives

Firm Blog Contributions

  • TCPA Blog – a resource analyzing TCPA-related litigation and regulatory developments
  • LaborSphere – a resource providing coverage and insights on breaking cases, recently enacted legislation and a broad range of labor issues

Leadership & Community

Pro Bono

  • Mark worked on a two-year effort to end the Pennsylvania Department of Corrections (DOC) practice of holding death-sentenced prisoners in permanent solitary confinement. Reid v. Wetzel.
  • Mark drafted a successful petition for allowance of appeal to the Supreme Court of Pennsylvania, persuading that court to review an intermediate appellate decision that had authorized the Pennsylvania State Police to refuse to disclose a full, unredacted copy of its policy governing the use of social media in criminal and employment-background investigations. ACLU of Pa. v. Pa. State Police (Pa. 2018).
  • Mark prepared a cert petition in an appeal out of the Second Circuit, challenging the district court’s use of crimes of which the defendant had been acquitted as a basis for increasing the length of his sentence for the two counts on which he had been convicted. Medina v. United States (U.S. 2017).

Civic Activities

  • Philadelphia Community Legal Services — Leadership Council, 2019-present


  • Best Lawyers® — "Ones to Watch," Appellate Practice; Commercial Litigation, 2024
  • Faegre Drinker — Pro Bono Honor Roll, 2020-23
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