Jaret N. Gronczewski


Jaret Gronczewski concentrates his practice in the area of commercial litigation. Jaret’s practice includes a variety of matters across multiple industries, including contract disputes, business torts, real estate and consumer-related litigation, banking and financial services litigation, restrictive covenant litigation, trademark/trade secret disputes, and federal False Claims Act litigation.

Before joining Blank Rome, Jaret served as a law clerk for the Honorable Barry T. Albin of the Supreme Court of New Jersey during the September 2006 term.

While in law school, Jaret was the executive editor of Volume 51 of the Villanova Law Review. He was elected to the Order of the Coif and was the recipient of the Harold Gill Reuschlein Scholarship. He also served as a judicial extern for the Honorable Jane R. Roth of the United States Court of Appeals for the Third Circuit and as a research assistant for Professor Ann C. Juliano.


  • Obtained injunction for leading Mixed Martial Arts promoter preventing marquee fighter from defecting to and fighting for largest competitor.
  • Participated in high-profile trade secrets dispute arising out of employee theft of trade secrets and successfully obtaining TRO preventing the defendant from establishing a competing entity in China. 
  • Participated on trial team that obtained $8.2 million arbitration award for an exclusive license of a well known brand in trademark and breach-of-contract action against a company that had violated its agency agreement.
  • Obtained full dismissal of $2 million claim against client related to alleged fraud and negligence in connection with transfer of air rights.
  • Obtained judgment of approximately $6.75 million and replevin order in favor of financial institution against corporate debtor in connection with an aircraft mortgage.
  • Obtained summary judgment in favor of client, a former prison guard, who was charged with violations of 42 U.S.C Section 1983 for excessive force and retaliation.
  • Successfully reversed a criminal assault conviction on behalf of a pro bono client.


  • 2012–2019, Pennsylvania “Rising Star” in Business Litigation, listed in Super Lawyers®



  • Philadelphia Bar Association
  • Historical Society for the Eastern District of Pennsylvania
  • Pennsylvania Bar Association
  • University of Pennsylvania Law School American Inn of Court
Professional Activities

Jaret serves as an arbitrator for the Philadelphia Court of Common Pleas Compulsory Arbitration Program. He is also actively engaged in pro bono representation through Philadelphia VIP, including winning a full defense verdict for a client in a personal injury dispute. Jaret was awarded the Firm’s 2016 “Pro Bono Hero” award.



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


  • Rutgers, the State University of New Jersey at New Brunswick, BA, highest honors
  • Villanova University School of Law, JD, summa cum laude