Warshaw Burstein LLP | Leron Thumim
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Leron  Thumim


Intellectual Property


Cornell University, B.A.

New York University School of Law, J.D.



  • New York
  • New Jersey
  • U.S. District Court for the Southern District of New York
  • U.S. District Court for the Eastern District of New York
  • U.S. District Court for the District of New Jersey
Leron Thumim
Tel: (212) 984-7833
Fax: (212) 972-9150
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Leron Thumim is a general commercial litigator whose broad experience includes representing clients in manufacturing, real estate, technology, finance, and service industries through all phases of arbitration, internal investigations, and general commercial litigation.

Mr. Thumim has represented clients in disputes involving breaches of contract and fiduciary duties, securities fraud, real property, class actions, false claims act violations, post-employment restrictive covenants, legal and accounting malpractice claims, alleged sexual harassment, ADA violations, prioritization of secured liens, the Stored Communications Act, product liability, and intellectual property.

Mr. Thumim understands that effective pursuit of a client’s objectives often requires assertiveness, initiative, tactical strategic thinking and, when appropriate, avoidance of needlessly confrontational stances. Clients appreciate his strong written and oral advocacy skills and his ability to devise “outside of the box” approaches to resolving disputes. He is constantly reassessing his approach based on the client’s situation to bring about a speedy, efficient, and favorable outcome. 


  • New York State Bar Association 
  • Federal Bar Council 
  • Cornell Jewish Life Fund, Co-President
  • Congregation Ohr Torah, Men’s Club President
  • Mountaintop Leage, Youth Soccer, Basketball, and T-Ball Coach


  • Hon. Shira A. Scheindlin, Southern District of New York, Clerk 
  • Quinn Emanuel Urquhart & Sullivan LLP, Associate
  • McDermott Will & Emery LLP, Associate


  • New York State Bar Association - “Litigation Issues in Contract Drafting.”
  • Co-Taught a CLE course on “No Oral Modification” Clauses – Enforcement and Exceptions
  • Taught a CLE course on “Ethics and E-Discovery:  Dos, Don’ts, and Really Don’ts


  • Super Lawyers New York Metro (2023)
  • Super Lawyers New York Metro Rising Stars (2018 - 2022)
  • Best Lawyers 2023 Ones to Watch (2023 - 2024)