Jim Mazewski is an Associate in the Litigation Practice Group at Mandelbaum Barrett PC in New Jersey, specializing in civil litigation at both the trial and appellate levels. His practice primarily involves representing corporations, entrepreneurs, and banks in a wide range of legal disputes including complex commercial cases, contractual disputes, employment matters, and construction issues.
Jim has substantial experience in trial preparation and handling appeals of varying complexity. He has managed petitions for new trials, challenged jury verdicts, and secured the reinstatement of voided contracts. He has authored multiple successful summary judgment motions and has represented international shipping companies, out-of-state commercial entities, and various public entities in jurisdictional and contractual disputes before the United States District Court for the District of New Jersey
Jim has also contributed to the legal community by preparing certification petitions and amicus curiae briefs before the Supreme Court of New Jersey on diverse legal topics.
Before joining Mandelbaum Barrett PC, Jim completed a clerkship with Judge Amy O’Connor of the New Jersey Appellate Division. During law school, he interned with Justice Anne M. Patterson of the Supreme Court of New Jersey and served as Symposium Editor of the Rutgers Law Review.
Judge Amy O’Connor of the New Jersey Appellate Division
New Jersey
U.S. District Court
District of New Jersey
Rutgers Law School— J.D., cum laude
Montclair State University – M.S., magna cum laude
Montclair State University, – B.S., cum laude
New York Cannabis Ruling: Businesses Can Raise Constitutional Challenges in OCM Administrative Hearings
August 13, 2025
In a major legal win for New York cannabis licensees, Mandelbaum Barrett PC has secured a precedent-setting decision that strengthens the rights of businesses facing Office of Cannabis Management (OCM) enforcement actions.Cannabis Department of Mandelbaum Barrett PC Announced Cannabis Law Practice of the Year Winner by New Jersey Law Journal
October 31, 2025
We’re proud to celebrate the Cannabis Department of Mandelbaum Barrett PC for being recognized by the New Jersey Law Journal as winners of the Cannabis Law Practice of the Year Award. This recognition underscores our team’s dedication to delivering strategic counsel across licensing, compliance, real estate, tax, banking, and litigation in the evolving cannabis, hemp […]