HOME/ ABOUT/ ATTORNEYS/ PRACTICE AREAS/ SETTLEMENTS & VERDICTS/ NOTEWORTHY CASES/ IN THE NEWS Stephen L. O'Brien Stephen L. O'Brien Stephen L. O'Brien became a partner in the firm in the fall of 1999. Since that time he has successfully represented numerous clients in Criminal, Personal Injury and Estate matters. Stephen L. O'Brien has litigated cases in the City of New York, Nassau, Suffolk and in the Eastern and Southern Districts of the United States District Courts. He has successfully argued cases in all New York state courts including the Appellate Division and the Court of Appeals. Prior to joining the firm, Stephen L. O'Brien gained substantial trial experience by serving as an Assistant District Attorney in the Suffolk County District Attorney's office. He served as the Deputy Bureau Chief of the Major Crimes Bureau, White Collar Bureau and the District Court Bureau during his career with the District Attorney's office. Mr. Stephen L. O'Brien is a member of Association of Trial Lawyers of America and the Suffolk County Bar Association, for whom he has lectured several times. Stephen L. O'Brien is admitted to practice in the State of New York and Connecticut as well as the Eastern and Southern Districts of the United States Federal Court. Contact Us Name * First Name Last Name Email Address * Subject * Message * 168 Smithtown Blvd. Nesconset NY 11767 P: (631) 265-6660 Monday through Friday 8AM to 6PM Saturday 10AM to 2PM Disclosure: The materials on this website have been prepared by O'Brien & O'Brien Law for informational purposes only and are not legal advice. The photos and videos on this website contain portrayals of clients by non-clients, re-enactment of scenes, pictures and persons which are not actual or authentic and depictions which are a dramatization. The information is not intended to create, and any receipt thereof does not constitute, an attorney-client relationship, nor does your use of any part of this website create or constitute an attorney-client privilege. No person or organization should act upon any information on this site without first seeking professional legal counsel. O'Brien & O'Brien Law cannot and does not represent you until our client intake process is completed. Further, we reserve the right to accept or decline representing any person or organization in any matter. Please do not send us any confidential information, including via the contact form available on this site.