We navigate complex legal problems.

The Zeisler law firm provides counseling to private funds, family offices, businesses and individuals in a sophisticated and cost-effective manner.



We were founded in New York City with the goal of achieving results for our clients in a highly responsive yet cost-sensitive manner. We build a deep understanding of our clients’ needs and aim to become our clients’ trusted advisors in our areas of expertise. We also serve as outside “in-house” counsel for several of our hedge fund, family office and smaller corporate clients given our long-standing relationships and knowledge of their businesses and objectives. We take pride in our client relationships.

  • We communicate promptly and concisely.
  • We act as trusted corporate advisors.
  • We craft intelligent and cost-effective legal strategies.
  • We advocate client positions, forcefully and cogently.
  • We negotiate and arbitrate disputes.
  • We try cases.


  • Arbitration and Mediation
  • Civil Litigation and Appellate Practice
  • Corporate
  • Director and Officer Liability
  • Employee Benefits & Executive Compensation
  • Employment Agreements and Restrictive Covenants
    (Non-Competes, Non-Solicits and NDAs)
  • Intellectual Property
    (Copyright, Trademark Infringement & Unfair Competition)
  • Libel and Slander
  • Not-For-Profit & Tax-Exempt Organizations
  • Partnership Disputes
  • Real Estate Disputes
  • Trade Secrets/Confidential Information
  • Trusts and Estates Litigation
  • Taxation


Aaron Zeisler

Aaron M. Zeisler, Partner

Phone: (917) 410-7712

Aaron M. Zeisler counsels hedge funds, family offices, businesses and their principals on dispute resolution and dispute avoidance, whether involving their investments, trade secrets, real estate, employment issues, member/officer liability, boards of directors, intellectual property, libel claims or privacy issues. Mr. Zeisler also regularly serves in the role of outside “in-house” counsel for several funds, family offices and small businesses that view Mr. Zeisler as a trusted advisor given his long-standing relationship with these clients and his familiarity with their businesses…

Complete Biography link

Robert Carrillo

Robert Carrillo, Partner

Phone: (917) 410-7522

Robert Carrillo advises clients on all areas of dispute resolution, whether involving litigation, arbitration, mediation, or proceedings before administrative or regulatory bodies. Mr. Carrillo counsels clients located throughout the United States, Europe, and the Americas, often in high-stakes and time-sensitive disputes. Mr. Carrillo is fluent in Spanish and counsels clients in both languages. He is particularly experienced in the areas of complex commercial litigation (frequently involving financial instruments), unfair competition and trademarks, employment law…

Complete Biography link

Kirk H. O'Ferrall

Kirk H. O’Ferrall, Partner

Phone: (917) 410-7732

Kirk H. O’Ferrall advises clients on issues involving taxation, employee benefits and executive compensation, and corporate law. With 30 years of practice, Mr. O’Ferrall has extensive experience counseling domestic and international corporations, partnerships, limited liability companies, not-for profit entities, and individuals. He brings a pragmatic approach to solving complex problems. In the area of taxation, Mr. O’Ferrall regularly advises small and large businesses in structuring new ventures and conducting transactions in a tax-efficient manner. He represents clients in…

Complete Biography link