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Leron Thumim is a general commercial litigator who has litigated an extremely broad range of matters including securities fraud litigation, trademark disputes, breaches of contract and fiduciary duties, and class actions, as well as claims involving prioritization of secured liens, real property, false claims act violations, legal and accounting malpractice, alleged sexual harassment, and more.

Mr. Thumim has represented clients through all phases of arbitrations, mediations, internal investigations, and general commercial litigation in both Federal and State Court.  Mr. Thumim has particularly extensive experience with e-discovery, and has handled and counseled clients through many complex and document-heavy disputes.

Mr. Thumim understands that his role as an advocate is to counsel his clients so they can understand the contours of their dispute, and work with them to achieve as favorable an outcome as possible in an efficient as possible manner.  Mr. Thumim understands that achieving these ends requires assertiveness, initiative, top-notch litigation skills, strategic thinking, and, when appropriate, avoidance of needlessly confrontational stances.  Clients appreciate his strong written and oral advocacy skills, negotiating acumen, ability to devise “outside the box” approaches to resolving disputes, and the manner in which he continually reassesses tactics to ensure an optimal approach.

AFFILIATIONS

• New York State Bar Association 
• Federal Bar Council 
• Cornell Jewish Life Fund, President
• Congregation Ohr Torah, Vice President
• Mountaintop League, Youth Soccer, Basketball, and T-Ball Coach

PRIOR AFFILIATIONS 

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

PRESENTATIONS 

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

AWARDS/HONORS

• Super Lawyers New York Metro (2024 - 2025)
• Super Lawyers New York Metro Rising Stars (2018 - 2023)
• Best Lawyers Ones to Watch (2023 - 2024)