William Deni

Gibbons PC

Mr. William P. Deni has a diverse practice in litigation and sports law. He is a trial lawyer who is fully conversant in the Federal Rules of Civil Procedure and Evidence and the state court rules of New Jersey and New York. Having served a clerkship in the United States District for the District of New Jersey, he is especially attuned to the Local Civil Rules and Local Patent Rules of the District of New Jersey.

Mr. Deni has extensive experience representing some of the world’s largest and most prestigious companies from diverse industries, including pharmaceuticals, energy, raw materials, health insurance, and financial services.

He litigates a wide range of matters in federal and state courts, including complex contractual and commercial disputes, trademark and patent infringement, business torts, partnership disputes, antitrust, and violations of Employee Retirement Income Security Act (ERISA), the Fair Debt Collection Practices Act (FDCPA), and other federal statutes.

Mr. Deni complements his litigation background with a sports and entertainment practice, advising professional athletes, Olympians, coaches, teams, and entertainers. He represents athletes in contract negotiations with professional clubs and in sponsorship endorsements. He is certified as a contract advisor by the National Football League Players Association (NFLPA) and is qualified as an agent by the International Federation of Association Football (FIFA).


  • Seton Hall University School of Law (J.D.)
  • Colgate University (B.A.)


  • State of New Jersey
  • United States District Court for the District of New Jersey
  • United States District Court for the Southern District of New York
  • United States District Court for the Eastern District of New York
  • National Football League Contract Advisor


  • American Bar Association
  • Hispanic National Bar Association
  • New Jersey State Bar Association
    • Entertainment, Arts & Sports Law Section
  • New York State Bar Association
    • Entertainment Arts & Sports Law Section


  • Represents global eye health company in Hatch-Waxman patent infringement litigation concerning ANDA seeking FDA approval to market generic versions of Istalol®. (S.D.N.Y.)
  • Represents a consortium of energy companies challenging state law as violative of Supremacy and Dormant Commerce Clauses of the U.S. Constitution. Full trial to verdict. (D.N.J.)
  • Represents a leading health insurer in a series of putative class actions alleging ERISA, RICO, and antitrust violations based on the health insurer’s payment practices. (D.N.J.)
  • Represents individual defendants in a civil action under the Alien Tort Claims Act and associated state law claims for the alleged funding of a foreign insurgent military organization. (D.N.J.)
  • Represented a biotech company in Hatch-Waxman patent infringement litigation concerning ANDA seeking FDA approval to market generic versions of Zanaflex Capsules®. Full trial to verdict. (D.N.J.)


Rate : $$$

What types of cases Attorney William Deni & Gibbons PC can handle?
Gibbons PC can handle cases related to laws concerning Financial Services, Litigation, Insurance, Entertainment, Business, Antitrust & Trade, Trademark infringement. We manually verify each attorney’s practice areas before approving their profiles and reviews on our website.
Where is Gibbons PC located?
Gibbons PC is located at 1 Gateway Center, Newark, NJ 07102, USA. You can reach out to Gibbons PC using their phone line 973-596-4853. You can also check their website gibbonslaw.com or email them at [email protected].
How much would it cost to hire Gibbons PC?
William Deni lawyer charges are specific to each case. However, they work with contingency fees and its ranges from $$ to $$$. They also provide free consultation [and no obligation quotes] if you are interested to hire.
Are William Deni reviews trust-able?
We have the ratings and reviews moderation team who checks and verifies every review submitted on our website manually. You can trust all the reviews you see on William Deni lawyer profile listing.

Rate and write a review

Your email address will not be published. Required fields are marked *

Is this your profile?Claim it now.

Make sure your information is up to date.
Gibbons PC
1 Gateway Center, Newark, NJ 07102, USA
Get directions

Tyler Nicoll

Crosspointe Drive 1019
Naples 34110 FL US

Rick Cofer

West Avenue 1002
Austin 78701 TX US

Brian Orlow