Practice Areas
Motor Vehicle Accidents
Work Accidents
Construction Site Accidents
Slip and Fall Accidents
Premises Accidents
Product Liability
Medical Malpractice
Nursing Home Neglect and Abuse
Wrongful Death
Civil Rights LItigation
Commercial Litigation
Employment Law


About Us

For more than 20 years, attorney Kevin Grennan has been helping clients on Long Island and in New York City, to recover money damages for personal injuries sustained in accidents of all kinds and as a result of medical negligence. We also handle civil rights, employment and commercial litigation.

When you entrust your personal injury matter to us, you will deal directly with Kevin Grennan, the founding member of the firm, as well as our legal support staff. We pride ourselves on being accessible and responsive to our clients. For new client matters and true emergency situations, we are available 24 hours a day, 7 days a week. Because many of our clients are unable to travel to our office as a result of their catastrophic injuries, Mr. Grennan will personally travel to you or your loved one's home or hospital room for a free initial consultation.

We zealously represent our clients, and, although most cases settle prior to trial, we prepare every case that we accept as if it were going to trial, from the outset. We believe that money recoveries are maximized when our adversaries know that we have exhaustively and diligently prepared our case as ready for trial.


We pride ourselves on the fact that a substantial percentage of our cases are referred to us by other attorneys who feel that our expertise could better serve them and their clients. Once a case is referred to us, both the attorney and client receive our high level of responsiveness and professionalism.


Mr. Grennan began his legal career working in the downtown Manhattan in-house counsel office of a major insurance carrier. In addition, before establishing his firm, he practiced for several years as an associate with a Long Island law firm specializing in both the defense and prosecution of personal injury and medical malpractice claims, and commercial and insurance litigation.


Mr. Grennan received a B.A. in Economics, cum laude, from St. John's University, and received his J.D. Degree from St. John's University School of Law in 1995. He is a member of the following associations:

  • The American Association for Justice
  • New York State Trial Lawyers Association
  • New York State Academy of Trial Lawyers
  • Nassau County Bar Association
  • Suffolk County Bar Association
  • Omicron Delta Epsilon, International Economics Honor Society

Mr. Grennan also sits on the Plaintiff's roundtable of the Nassau County Bar Association.

He is admitted to practice in all New York State Courts and in the Federal Courts for the Southern District and Eastern District of New York, as well as the Federal Second Circuit Court of Appeals.

If you or a loved one has been injured and you want to know what your rights are in pursuing a case:

Contact Us for a FREE Consultation 24 Hours a Day - 7 Days a Week

DISCLAIMER: This website is provided for general information about the Law Offices of Kevin T. Grennan, PLLC and its areas of practice. Information contained in this website is not intended to create an attorney-client relationship, nor does it constitute legal advice to anyone receiving such information. No electronic communication with the Law Offices of Kevin T. Grennan, PLLC on its own will generate an attorney-client relationship, nor will it be considered an attorney-client privileged communication. No electronic communication with the Law Offices of Kevin T. Grennan, PLLC will generate an obligation on their part to respond.

Long Island Office
(All Mail and Service of Process to This Office)
666 Old Country Road, Suite 555
Garden City, NY 11530


New York City Office
420 Lexington Avenue, Suite 300
New York, NY 10170

(By Appointment Only)


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