Mark A Siesel

When you have been charged with a crime, you want an aggressive, experienced and knowledgeable advocate who will obtain the best outcome for your case. Sometimes, the best decision is to take the case to trial, if the DA’s case is weak, has inconclusive evidence, or is based in part on witnesses who are unreliable. In other cases, however, there are situations in which the best possible outcome for the client and his or her family is to work out a resolution of the case with the prosecutor. The determination as to the correct course of action is a collaborative efforts, but it is vital that you retain attorneys who have the requisite experience to guide you to the correct decision. We discuss your available options, including determining whether going to trial or plea bargaining would be the best option for your individual case.

Our founder, Mark A. Siesel, established his White Plains, New York-based law office to help clients throughout New York including Westchester County, Putnam County, Orange County, Rockland County, Dutchess County, and the five boroughs of New York City. More recently, we have now opened offices in the Bronx, and have a satellite office in Peekskill, New York for out clients who reside in the northern counties. Since 1986, local residents have relied on our office for personalized and diligent legal representation.

In addition to representing clients in a wide variety of criminal matters, including DWI’s, DWAID (driving while ability impaired by drugs), drug possession, assaults, possession of forged instruments, petit and grand larceny, burglary, we handle various administrative hearings, including fatality and refusal hearings at the Department of Motor Vehicles. Further, our founder Mark A. Siesel has litigated hundreds of personal injury actions for clients in the state and federal courts of New York for well over twenty five years. He has represented clients in car accidents, construction accidents, motorcycle accidents, truck accidents, all types of premises liability cases, medical malpractice, products liability, elevator and escalator accidents, dog bites, and subway/train accidents and derailments. He is also certified as a court appointed attorney, guardian, attorney for an incapacitated person, and court evaluator.

Because of our extensive background handling a significant variety of cases which are litigated to trial, we make clear to the prosecution that if the evidence is not substantial against our clients, we will not hesitate to take the matter to trial and reject unacceptable offers. We pride ourselves on our dedication to keep our clients fully informed as to the status of their cases at all times, and can be reached by email when we are not in the office. It is our strict policy that all client calls are to be returned the same day, and if the handling attorney is on trial, certainly within 24 hours or by an email after Court. We understand that lack of communication with attorneys is the number one complaint that clients have with other firms, and we make sure that this is never an issue in our firm.

Client Reviews

Mark Siesel made taking care of my traffic case easy, and delivered with results. Mark was professional, prompt with return calls or emails, and very efficient. He followed up on the day of my case, and took care of everything as promised. I would recommend Mark highly to my friends or colleagues in...


Recently, I had a legal situation that required the assistance from an attorney. Well, not living in the State of New York I had to do some research regarding qualified attorneys in New York. I found Mark Siesel. I'm happy to write that Mr. Siesel came through with "flying colors." Mark made sure my...


I was in a horrific train accident. After my first phone conversation with Mark, I knew that I made the right decision. He was compassionate, knowledgeable, and extremely accommodating. He was with me every step of the way and he was very informative. His advice and counsel comes from many years of...

A.M. (Former Client)

Great representation and very passionate and dedicated staff. I would highly reccommend this law firm to anyone in need of competent and knowledgable attorney work throughout Westchester County. Mr Siesel is a true professional and his staff is amazing and very helpful. Dont hesitate to call!!

M. Jackson

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  1. 1 Serving New York Since 1986
  2. 2 Available 24/7
  3. 3 Se Habla Español
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