Joseph B. Fiorenzo is Co-Chair of the Sills Cummis & Gross Litigation Department and Chair of the Complex Business Litigation Practice Group.  Mr. Fiorenzo has over 30 years of trial experience in a broad range of complex business disputes in both federal and state courts in New Jersey and New York.

As leader of the Firm’s Complex Business Litigation Practice Group, Mr. Fiorenzo has handled complex commercial and tort litigation matters for the business community spanning a wide spectrum of subject matters, including corporate and partnership, complex contract dispute, intellectual property matters, complex insurance coverage issues, land use matters and high-stakes probate litigation.  In light of this substantial business litigation background, Mr. Fiorenzo has also been retained by a number of law firms to defend professional liability claims.

Mr. Fiorenzo has extensive trial experience, having tried approximately 100 cases to verdict.  In addition, he has successfully argued many matters before the Superior Court, Appellate Division and the New Jersey Supreme Court.

Mr. Fiorenzo has lectured extensively regarding various aspects of the litigation process, including as an instructor in a number of trial advocacy seminars given by the New Jersey Institute of Continuing Legal Education.

Prior to joining the Firm, Mr. Fiorenzo was the Managing Partner of a boutique law firm focusing on complex business litigation.


  • Litigation

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Court Admissions

  • U.S. District Court, District of New Jersey
  • U.S. District Court, Southern District of New York
  • U.S. Court of Appeals, Third Circuit
  • U.S. Court of Appeals, Federal Circuit
  • U.S. Court of International Trade



Rankings and Recognition

  • Selected for inclusion in:
  • Benchmark Litigation: America’s Leading Litigation Firms and Attorneys®* "Local Litigation Star" 2019-2024
  • New Jersey Super Lawyers®* 2008-2022, Business Litigation; General Litigation

* See Award Methodology. No aspect of this advertisement has been approved by the Supreme Court of New Jersey.


  • Professional Affiliations
  • Member, Supreme Court of New Jersey District Ethics Committee (by appointment)

  • Chairman, Supreme Court of New Jersey Court Fee Arbitration Committee (by appointment)

  • Member, American Bar Association

  • Member, New Jersey State Bar Association

  • Member, New Jersey Association of Trial Lawyers

  • Member, Bergen County Bar Association

    – Chairman, General Equity Committee
    – Member, Judicial Performance Committee

  • Trial Master, Morris Pashman Inn of Court

  • Community Affiliations
  • Member, Valley Hospital President’s Council (March 1, 2006-March 6, 2012)

  • Member of the Board of Directors, Foundation for Free Enterprise

  • Former Mayor, Township of Wyckoff

  • Former Member and Finance Chairman, Township of Wyckoff Committee

  • Former Trustee and Vice President, Township of Wyckoff Education Foundation

  • Former Chairman, Township of Wyckoff Board of Parks and Recreation

  • Former Member, Township of Wyckoff Planning Board

  • President, The Tuxedo Club

  • Former Head Coach, Traveling Basketball, Township of Wyckoff

  • Former Coach, Recreation Soccer and Baseball, Township of Wyckoff

  • Former Coach, Torpedoes Soccer Club, Township of Wyckoff


  • J.D., Rutgers Law School, with honors
  • B.A., Rutgers University, with honors and highest distinction

Bar Admissions

  • New Jersey
  • New York