Trusted counsel since 1983

Insurance & Insurance Litigation

As one of the insurance industry’s pre-eminent law firms, and the only insurance practice on Long Island ranked “Tier 1” by U.S. News & World Report, Ohrenstein & Brown is known for its comprehensive corporate and regulatory insurance practice

Business Counseling

Our Business Group counsels publicly and privately held enterprises with respect to the formation of business organizations, including corporations, partnerships and limited liability companies; the negotiation and consummation of a wide variety of agreements

Government Relations

Led by former New York State Senate Minority Leader Manfred Ohrenstein, the firm’s Government Affairs practice leverages its strong relationships at all levels of city, state, and federal government on behalf of clients doing business with government
“Mike [Brown] is an extremely effective and tough litigator. He's also a strategic thinker both inside and outside the courtroom.”
- Don DeCarlo,
Director, AmTrust Financial Services, Inc. and former Senior Vice President and General Counsel of Travelers Group

Partners & Counsel

Manfred Ohrenstein


Manfred Ohrenstein, a founding partner and a former Legislative Leader of the N.Y. State Senate, serves as a strategic consultant and government affairs representative for large and medium sized companies.

Michael D. Brown


Michael D. Brown, founding partner is an accomplished litigator and trusted counselor. His career has been one of distinction in the litigation, corporate and insurance regulatory areas.

Matthew Bryant


Matt is an experienced and creative litigator with a track record of success as counsel for both plaintiff and defense. These results not only speak for themselves but have earned him a preeminent peer review ranking as an effective and successful litigator.

Brian R. Gerstein


Counsel to the firm, Brian R. Gerstein represents clients in commercial litigation, municipal court criminal defense and appellate practice.
  • John Hill
    I have found O&B attorneys to be extremely knowledgeable and resourceful in addressing complex regulatory and compliance issues.
    John Hill
    President and Chief Operating Officer - Magna Carta Companies
  • Ivy Fischer, Esq.
    Mike is a creative problem-solver, always looking for the optimal solution.  He's an honest evaluator of a case in terms of chances at settlement or chances at trial.
    Ivy Fischer, Esq.
    Senior Vice President and Chief Legal Counsel - HUB International Northeast
  • Don DeCarlo
    They are not only great lawyers, but they are very creative when they have to be to solve problems.
    Don DeCarlo
    Director, AmTrust Financial Services, Inc.; Former Senior Vice President and General Counsel, Travelers Group
  • Stephen B. Ungar
    Mike Brown is a strategic resource. He is a true counselor as well as a litigator. If a matter shouldn’t be litigated, Mike will tell you that. But when you do need a litigator, Mike is a tough, knowledgeable and feared one.
    Stephen B. Ungar
    Senior Vice President, General Counsel and Secretary, AmTrust Financial Services, Inc.
  • John Oster
    We had a large development project and we needed different levels of government to communicate with each other and find ways to work together to achieve a common goal. The problem is they don’t normally do that. One of Fred’s Ohrenstein’s specialties is getting people on the federal, state, and local levels of government to talk with each other and recognize common agendas. Fred has been extremely helpful to us in that respect.
    John Oster
    President, Edgemere Development, Inc.
  • Terence Kelleher
    Mike is a very well-prepared, insightful, determined litigator. He is always available and gives you a lot of insight. He listens carefully to what to the client wants and proceeds from there.
    Terence Kelleher
    President and CEO, Combined Coordinating Counsel
  •  Warren Haber
    Fred has a very broad “customer base.” He has extensive relationships and has a lot of experience. He knows the process and how to expedite matters, and that facilitates addressing issues efficiently.
    Warren Haber
    Chairman of the Board and Chief Executive Officer, Founders Equity