Long Island Divorce & Family Law Attorneys

Cassandra was outstanding throughout my mother's divorce process. She was professional, responsive, and on top of every detail from start to finish. She made a difficult situation much easier to navigate and always kept us informed along the way. We are very grateful for her support and highly recommend her services.

I achieved a highly successful result in a very difficult custody case, and I credit that to Matt Seidner and his exceptional team. Matt’s expertise in Family Law, combined with his strong courtroom presence, sets him apart. Lynn and the rest of the team prepare with remarkable diligence and are consistently 100% ready. Knowing you’re fully understood and in excellent hands brings tremendous peace of mind. If your case ends up requiring a trial, Matt is the attorney you want. Absolutely recommended.

I had a great experience with this divorce firm. The entire team was professional, compassionate, and very helpful throughout the process. Divorce can be an incredibly stressful and emotional experience, but they made me feel supported. I would definitely recommend this firm to anyone looking for knowledgeable, caring, and professional legal representation during a divorce.

My experience with Seidner and Associates was truly exceptional from start to finish. Cassandre was recommended to me by my cousin, and I cannot express how grateful I am that I was guided to her. Going through a divorce is one of the most emotionally challenging experiences, and having Cassandre by my side made all the difference. She was consistently attentive, compassionate, and incredibly responsive—answering every email and every phone call with patience and clarity. No matter how overwhelmed I felt, she made me feel heard, supported, and never alone in the process. Her professionalism, knowledge, and dedication gave me a sense of confidence and peace during a time when I needed it most. This experience was truly life-changing, and I am so thankful to have had such a strong, reliable advocate fighting for me every step of the way. I would highly recommend Cassandre and Seidner and Associates to anyone in need of not only excellent legal representation, but genuine care and support.

I can’t recommend Matt Seidner and Lynne Sztulwark enough. Going through a divorce was one of the most challenging periods of my life, but having them as my attorneys made all the difference. From our first consultation, they demonstrated both professional excellence and genuine compassion. What impressed me most was their clear communication style. Complex legal procedures were explained in terms I could understand, and I always felt informed about the status of my case. Lynne, who took over my case, was incredibly responsive to my questions and concerns, often returning calls within hours even during busy periods. She fought tirelessly for my interests while maintaining a level-headed approach that helped keep negotiations productive. Her expertise in family law was evident throughout the process, and she anticipated potential issues before they became problems. The attention to detail in all documentation was meticulous. Perhaps most importantly, Lynne treated me with dignity and respect during an emotionally difficult time. She was patient with my concerns and provided realistic expectations while still advocating strongly on my behalf. The final settlement exceeded what I had hoped for initially. The entire billing process was transparent with no surprises. Given the stress and complexity involved in divorce proceedings, having such competent legal representation gave me tremendous peace of mind. If you need a divorce attorney who combines legal expertise with genuine care for their clients, look no further. I’m grateful for the Law Offices of Seidner & Associates, PC’s excellent work during this transition in my life.

Simply said the Best Lawyer out there. If it wasn’t for his help I would not have contact with my daughters Il will always be grateful.

Throughout the whole process I felt confident that I choose the right attorney. Matthew S. Seidner’s professionalism and expertise were of invaluable help and support to me during my divorce process. My intention was to pursue an amicable divorce and Matthew was clear in his respect and support of that intent. During the entire process, his office staff was welcoming and responsive to my calls and questions in a positive and supportive way. When my emotions were running high, they brought a calm and measured approach that made me feel supported and understood. Words cannot express the gratitude I have for making my divorce process as stress free as possible. What mattered the most to me is that Matthew understood the need for my family to come out of this divorce with the least amount of damage possible for the sake of my children, with that being said I would not hesitate to refer a client to Matthew S. Seidner.

If you want to win and see the light at the end, Matthew Seidner is the attorney to hire. I hired Seidner & Associates for my child custody and child support case. My case went on for 3 1/2 years and throughout that entire time, Matthew Seidner was by my side. When I couldn’t see the light at the end of the tunnel, he encouraged me and keep my hopes up. He handled my case and treated me like family. Matthew Seidner is a very experienced, professional and passionate attorney.

Matt presented my position to the Court in an extremely confident manner and, piece-by-piece, dismantled his opponent’s arguments resulting in a favorable verdict for us. 13 years after my initial divorce, I had to return to Queens Family Court to respond to a host of motions by my ex-wife. At first I thought that I could handle the matter myself but ultimately, I made the decision to retain an attorney that would vigorously defend my rights as a father. After meeting three different attorneys, I had the privilege of meeting Matt Seidner. From the initial consultation to our court date, Matt consistently helped me to take emotion out of my decisions and to focus exclusively on the law. Matt Seidner is one of the best family law trial attorneys that I have ever seen and the only attorney that I would consider to defend my rights as a father.

I interviewed many lawyers before hiring Matt Seidner. Something just felt right with him and I went with my intuition because I knew I was only going to get one chance at this case. I wanted to relocate to Florida with my three children so we could have a better life after being abandoned by a deadbeat husband and father. Matt fought so hard for me all the way. The other side obviously knew they were going to lose so they tried every delay tactic in the book but it didn’t matter. Matt kept me calm, put them in their place, got the court on our side, and now I’m in Florida with my kids. His entire staff knew my case and I felt like part of their family. Kristen and Nicole were really on the ball. Now that it’s finally over, I’ll miss everyone. Thank you so much!

I have 2 children. Matt made sure that my children and I were taken care of. He is an attorney that truly cares, especially in cases that involve children. Matthew Seidner is a good lawyer. He helped me through a difficult divorce.

I hired Mr. Seidner in 2017 to represent me in the matter of child support following my divorce. He was always very professional, attentive, supportive and kept me informed immediately throughout the case. He was always interested in finding a resolution that would be in my family’s best interest and always made himself available if I had any questions or concerns. He and his affiliates were always there to guide me through anything I needed or had any concern about.

Matt Seidner helped us gain temporary custody of my Grandson (6 years old). I’m positive we will get custody of my Grandson. Seidner and Associates treats us like family. If anyone is looking for an excellent lawyer I recommend Matt Seidner and his wonderful team.

A divorce is a stressful time. My goal was to find an attorney who was able to advise me of ALL my options, and yet was willing to accept my decisions regarding how to proceed. I found that Matthew Seidner’s number one concern was always for advising me of my options throughout the process. Unlike previous legal experiences with other law firms, I was always able to speak with him directly, although I must say I found his legal staff to be very experienced, informative, and I felt comfortable working with them as well. I was kept informed constantly through the entire process. My main goal was a quick and fair settlement… my experience was a 10 out of 10.

You feel like one of the family there and know you are taken care of. When I came to the Seidner firm I was sad, confused dealing with a subject I knew nothing about, and felt I may be judged by my family’s craziness. I felt welcomed and comfortable. One of the staff was already dealing with the same family situation and made me see it is not so unusual. The staff act as family towards each other and have great respect for Matt. I can see why. Matt is kind, smart, sincere, and really works hard for his client.

I had the pleasure of meeting Matt during my times of despair. My Case was very complicated because it involved international child custody and Matt handled this case as if it was right here in his backyard. My Daughter that I have been fighting for over 18 months was in my care within 48 hours after meeting Mr. Seidner and his devoted team. His professionalism and dedication is remarkable. He guided me every step of the way without ever feeling lost, he made me aware of his every move and never once gave me false hope. His work ethics is great, non-judgmental, diligent, compassionate and caring; he is the true definition of an advocate. Even if my case had not turned out the way it did I would have not been disappointed in Mr. Seidner’s work because I knew he put his all into it. If you choose Attorney Seidner to represent you, trust me you will be blessed beyond measure. Again with great pride I highly recommend Mr. Matthew Seidner.

Wow, I’m so blessed to have found Matt. When I realized things were getting out of hand with my son’s affairs at his home I decided to take action, into this matter. See, my son, is my life. Also he is all I’ve got. I was feeling very powerless, and very emotional about this whole situation, since 99.99% of the people I have spoken to about father custody were telling me that the mother has a whole lot more power than the father when it comes to custody. But, all it took was a phone call and a simple interview with Matt. Wow, he reassured me in such way that it was going to be fine. He immediately picked up his pad, and started to write away. By the time I explain my whole situation, he gave me this reassuring smile and told me, “Ish, you got a case here”. After he explained all, he asked me if I want him to represent me, and I took a leap of faith, and I agreed….Wow, that was by far the best decision I’ve ever made in my life. And may be a year or less I think “cause it went so fast” we won the case. See I didn’t win the case, nor my spouse, but justice was done for my son. Now we are happy together. My son cannot thank Matt enough. Matt God bless you and your family…… Me and my son are forever in ded to you, friend.

I could not go to sleep tonight without letting you know how impressive you were in court today. I am still in awe. Thank you for believing in me and recognizing the values of love, commitment and dedication that are inherent in my relentless pursuit to find my kids. It is a leap of faith coupled with grit and determination that I am here to defend my rights to my children. I realize very well that this case is engaging much more time and resources than we would have cared for but I refuse and will not allow money to be a deciding factor on whether I continue or stop. I am prepared to utilize all my savings and sell all my assets if that become necessary to fight for my children. Again I want to compliment you for an excellent job. Despite being grief stricken I enjoy working every step of the way with you. The professionalism and dedication of you and your team is truly remarkable. Please give my kind regards to your team.

He won me my case for my relocation and custody and I will be starting my new life down south. He treats you like a person, not just another case. Working with Matthew and his staff was a Pleasure. He did everything he said he would. His whole staff is a pleasure to deal with. I would recommend Matthew to everyone. He is the best lawyer I ever had and would use him again if I ever needed.

Within minutes of meeting Mr. Seidner I had hope for the first time in months. His caring ways made you feel like family. When I came to Seidner & Associates, I was at my lowest point, and felt I had nowhere to turn. His staff is always willing and happy to speak with you and answer any questions. They are the best. You will never find better. When all is said and done I will definitely miss them all.

Attorney Seidner & Attorney Devaney were really fantastic, and they did help me and my children. I could secure and obtain what I needed for us. Without their support, we could not maintain our happy and peaceful life! Thank you so much.

I’ve had a great experience with this attorney at law. We were successful in dismissing the order being pursued to me. He did a great job and I am very thankful to him and his associates, Kristen in particular. I highly recommend Matt and his law firm, Seidner & Associates, PC.

When I walked into Matt’s office, I had just come off an emotional roller coaster. I was about to leave the country and needed someone, who was going to represent my case, while I was away. He listened to me and gave his opinion on how to best handle the situation and we moved forward. There were the inevitable bumps on the road, each of which were handled swiftly and with grace. Matt and Kristen were always available when I needed information and their legal advice helped keep my situation in perspective.

Matt, Regardless of the outcome I want to thank you for your professionalism and compassion from day one. I left the hearing today knowing you made the best case possible and the rest is in the judge’s hands. Anyone who comes through your doors is very fortunate to have you represent them. See you soon and thanks, you’re a great guy, and I know I’m not the first to recognize it.

Matt addressed all of my questions and concerns which made me feel very comfortable. He completely understood my situation and my expectations. I was referred to Seidner & Associates by a close friend of the family. She advised that I would be very pleased with their services and she was right. Overall, I was very satisfied with my outcome and the service they provided.

Matthew Seidner is very professional. He is a human being with heart and soul. He knows exactly what to say to you in troubled times to make you feel better. I was very stressed out regarding my matter and he was able to alleviate my anxiety. I achieved a lot in a short period of time. My case was resolved quickly and I was able to get much more than I expected. Thank you to Matthew and everyone at the Law Offices of Seidner & Associates.

Seidner & Associates was a breath of fresh air after meeting with many other attorneys who were unsatisfactory. From my first interaction with Mary Lou who scheduled my first appointment to meeting Matt Seidner, I knew this was a law firm that truly cares. I am confident in their capabilities and have nothing to worry about knowing that Seidner & Associates is my law firm.

I felt very confident that my matter was being handled with the utmost dedication and professionalism. I found the service I was provided to be very professional and the staff was always very courteous.

You know that you are in extremely good hands when you come here. That gives us a feeling of security and peace of mind. Finding an attorney that is extremely knowledgeable, caring and dedicated is wonderful. However, his office staff is the sweetest, kindest people you ever want to know.

Good Evening Matt, I just wanted to say thank you again for the time spent today during our consultation. I appreciate the brutal honesty you displayed. Over the last 8 years or so, I’ve gotten the run around and have thrown away tons of money with no good outcome. Thank you for telling me the truth and not just taking my money only to tell me later I never really had a good case. If I hear of any co-workers/friends that are in need of assistance, you’ll be the first lawyer they call. All the Best in 2012.

Matt is the best lawyer on Long Island. He is fully committed to helping you as client and will not rest until he makes sure that you win your case. His high level of professionalism is unmatched and I highly recommend that you choose him as a lawyer for your case.

I am extremely happy with the services provided by Mr. Seidner. Everyone at the firm is very nice, very good and on the ball. Matthew has been the greatest. He has a lot of patience and is very tolerant.