Mario J. DeRossi

Mario J. DeRossi

also known as DeRossi Law Firm, LLC

4.9
Rating: 10.0

Licensed for 24 years

Divorce and separation Lawyer at Mineola, NY
Practice Areas: Divorce & Separation, Family, Child Custody, Child Support

100 Old Country Road, Suite 301, Mineola, NY

About Mario

Biography

Fees and Rates

We have not found any cost information for this lawyer


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Licenses

Licensed in New York for 24 years

State: New York

Acquired: 2001

Currently Registered

No misconduct found

Licensed in Massachusetts for 24 years

State: Massachusetts

Acquired: 2001

Inactive

No misconduct found

Location

DeRossi Law Firm LLC

100 Old Country Road, Suite 301, Mineola, NY, 11501

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Mario J. DeRossi's Reviews

Avvo Review Score

4.9 /5.0

113 Client Reviews

Showing 16 - 20 of 35 reviews | General Knowledge

Posted by Rich | October 13, 2016 | Hired Attorney | Divorce & Separation

Rich Murasso

My advice to anyone who is looking to be fairly represented in your divorce matter look no further. I hired Mario to handle my divorce. He guided me through the process with a steady hand and a sensible attitude. He is accessible and always gives the right advice avoiding confrontation at all costs. ...I have already referred a few friends to him!

Posted by anonymous | September 06, 2015 | Hired Attorney | Divorce & Separation

Divorced!

Truly a professional. Honest and tells you the law not necessarily what you want to hear, but it's the truth. My fourth lawyer, he finally got the job done! Oh and won't suck the life out of you and your bank account like most other divorce lawyers. A gentleman that is respected and well known ...in the courts. Hire Mario! --happily divorced with full custudy of three year old son!!!

Posted by Kristin | February 12, 2015 | Divorce & Separation

Excellent attorney

Mario DeRossi is an excellent divorce attorney!!! I would highly recommend his services. He is very professional, knowledgeable, and courteous! He was always quik to respond and seemed to always be on top of things. This is always a difficult situation and he always seemed to put my mind at ease. ...When I really needed things to be done, he got it done! Mr. DeRossi is simply great at what he does and I would not hesitate to recommend him to family and friends!

Posted by Denise | November 02, 2014 | Divorce & Separation

ABSOLUTELY AMAZING ATTORNEY

So in all my years I have NEVER in my life EVER felt compelled to write a review on anyone, or anything negative or positive. This man has truly been a God send. Going through a divorce is life changing, and when I had been put in the situation in 2010 I didn't know where to turn… Emotionally a... wreck, my first attorney was a recommendation of a friend. Not feeling comfortable I turned to a second attorney, also a recommendation of a friend. Both experiences were awful. I finally decided to make my own choices and decisions based on my own research. I dedicated three months to researching the best attorneys everywhere. From manhattan to long island. I read every review on every attorney, and made appointment after appointment ready to start my search. Mario DeRossi was the last attorney that I found while researching and the first among many appointments I had scheduled. I went to see him, and as he intently listened to my story… I could tell you that for the very first time in three years I was told "the truth" … not what I necessarily wanted to hear as a person going through a divorce, but what I NEEDED to hear as a person going through a divorce. Mario is knowledgable, confident, honorable, honest, a true man of character and integrity, respectful, kind, and aggressive all wrapped up in one. Characters traits that one looks for in a human being and are hard to find… are virtually impossible to find in an attorney... you WILL find in this man. As soon as I left his office after my consultation I knew he was the one that would see me through to the end of what was a grueling and ugly five year divorce. ( So long bc my ex husband had disappeared for so many years ) Although I knew Mario was the one attorney, I continued to go on my appointments. Attorney after attorney, after attorney, it was a nightmare… although at the same time a total consolation to me that Mario was the one. So our journey began. He is not only an amazing attorney, but an amazing man, all in which carries over in to his work ethic and his practice. He saw me through to the very end. Mario ALWAYS responded in a timely manner, and NEVER once left me questioning ANYTHING. He would repeat and explain things to me until He knew and was confident that I completely understood and was comfortable with what he was conveying to me. I promise you, traits you will NEVER find in another attorney. Truly there are not enough favorable, beneficial, and gratifying words I can say about this man. He is truly a diamond in a sea of rocks. I would also like to add what an incredible and amazing team and staff he has working for him. Georgetta, Danielle, and Regina are such an asset to his work. Good draws in good. This review is my humble way of screaming out to those going through divorce the praises of such an incredible attorney and man!!! Thank you Mario from the depths of my soul for ALL you have done for me in such a traumatic time of my life. Thank you for seeing me through this to the very end… In which is truly anew beginning. I truly hope this review helps those discerning such a difficult and important decision at such a critical and curtail time in someones life. When it is so hard to be making choices being in such an emotionally vulnerable state… I can tell you with certitude look no further,

Posted by Jen | July 15, 2014 | Divorce & Separation

Mario is a solid divorce attorney with a heart of gold

It might seem like an oxymoron, but this divorce attorney truly CARES about his clients. Mario did not mince words with me - he educated me about divorce law, he protected my best interests, and he kept me posted on the progress of my case while keeping my spirits in tact. He really went beyond the c...all of duty, hearing me out when he didn't "have to" and even feeling my pain countless times before he thankfully settled my case. Mario is a solid divorce attorney with a heart of gold-- a rarity in this very difficult and highly sensitive line of work.

See All Client Reviews

Mario J. DeRossi's Lawyer Endorsements

Endorse Mario
Michael Robert Gionesi headshot
Michael Gionesi

Divorce and separation lawyer | Sep 17

Relationship: Fellow lawyer in community

"A powerful and zealous advocate for his clients, Mario has earned the respect of his peers and the judiciary. His level of civility is second to none, which makes him an even more effective advocate. His effectiveness is surpassed only by his keen intellect. I wholeheartedly endorse him."

Michael Drew DiFalco headshot
Michael DiFalco

Divorce and separation lawyer | Sep 19

Relationship: Opposing Counsel on matter

"I endorse this lawyer. Mario is an excellent attorney. We've had a couple of cases together and he's a zealous advocate for his clients while remaining a gentleman."

Somair Syed Alam headshot
Somair Alam

Divorce and separation lawyer | Feb 13

Relationship: Fellow lawyer in community

"Exceptional attorney, dedicated to client success. Highly recommended."

Joshua Bradley Hecht headshot
Joshua Hecht

Divorce and separation lawyer | Oct 02

Relationship: Fellow lawyer in community

"Mario is an exceptional attorney. His knowledge of family law matters is impressively extensive, but more importantly she has a deep focus on the needs of her clients. Highly recommended!"

Barry J. Gross headshot
Barry Gross

Divorce and separation lawyer | Jan 22

Relationship: Opposing Counsel on matter

"I endorse this lawyer. Mr. DeRossi is an extremely talented and knowledgeable attorney. He is "old school" in that his word is his bond."

Frederick William Vasselman headshot
Frederick Vasselman

Divorce and separation lawyer | May 29

Relationship: Worked for lawyer

"I endorse this lawyer."

Susan Ann Kassel headshot
Susan Kassel

Divorce and separation lawyer | May 17

Relationship: Opposing Counsel on matter

"I endorse this lawyer. Mario is always well prepared, clever and quick on his feet. He is an excellent attorney."

John M O'Brien headshot
John O'Brien

Commercial real estate lawyer | May 14

Relationship: Fellow lawyer in community

"A truly excellent attorney well respected in the legal community. I wholeheartedly recommend him to anyone looking for a lawyer who knows the law and truly cares about protecting the rights of his clients and getting them the most favorable result possible."

Christopher Daniel Leroi headshot
Christopher Leroi

Divorce and separation lawyer | Sep 15

Relationship: Fellow lawyer in community

"Mr. DeRossi is an outstanding attorney who provides exemplary advice on Avvo. I would recommend everyone and anyone to him for representation. Even though I have been practicing fo 24 years, as a judge, magistrate, prosecutors, and in private practice, I learn valuable new information from him every day. A superb attorney."

Howard M Lewis headshot
Howard Lewis

Divorce and separation lawyer | Jun 09

Relationship: Fellow lawyer in community

"I endorse this lawyer. Attorney DeRossi is an outstanding attorney with an exceptional reputation. He is a strong and zealous advocate for his clients and a credit to the legal profession. I highly recommend his legal services."

Ivan E. Young headshot
Ivan Young

Divorce and separation lawyer | Apr 10

Relationship: Fellow lawyer in community

"Having known Mario for a few years now, I can firmly state that he is a gifted attorney that advocates for his Client's in a manner rivaled by few. Not only does Mario have a profound knowledge of the law, but he truly is personable and attentive to his Clients which gives all those that go to him a genuine sense of comfort in such a stressful situation. I would and do recommend Mario to all Clients seeking representation in matrimonial related issues."

Jason Adam Isaacson headshot
Jason Isaacson

Divorce and separation lawyer | Oct 11

Relationship: Opposing Counsel on matter

"A strong advocate and always professional, Mr. DeRossi is an experienced attorney who offers practical solutions to resolve difficult issues."

Robert Scott Grossman headshot
Robert Grossman

Family lawyer | Jun 21

Relationship: Opposing Counsel on matter

"Mario and i were adversaries in a contested matrimonial case. I found him to be knowledgeable, a true professional, and most importantly, a man of his word."

Matthew Scott Seidner headshot
Matthew Seidner

Family lawyer | Mar 20

Relationship: Fellow lawyer in community

"Mr. DeRossi has an excellent reputation not only among other attorneys but before the bench. It is a privilege to consider him a colleague in an area of law that requires not only intelligence but compassion and patience."

Jill Altarac headshot
Jill Altarac

Divorce and separation lawyer | Nov 14

Relationship: Opposing Counsel on matter

"I have had several matters with Mr. DeRossi, and he is a strong advocate for his clients. Mr. DeRossi is very professional and works diligently to assist his clients achieve their intended results."

Caitlin Donahue headshot
Caitlin Donahue

Family lawyer | Aug 16

Relationship: Opposing Counsel on matter

"Mr. DeRossi displays an impressive level of professionalism and integrity while representing his clients. Not only does he have an obvious command of the law, but also places a high priority on maintaining the trust of opposing counsel."

Christian Aaron Pickney headshot
Christian Pickney

Divorce and separation lawyer | Aug 28

Relationship: Opposing Counsel on matter

"In a divorce case I handled against Mr. Derossi he represented his client zeaolously and professionally. He protected his client's rights and did not engage in unnecessary litigation that would have wasted our client's money and time. He knows the law and conducts himelf professionally. It was my privilege to work with this attorney."

Brian C. Pascale headshot
Brian Pascale

Personal injury lawyer | Aug 05

Relationship: Worked together on matter

"I endorse this lawyer's work. He is an amazing, detail oriented, and professional litigator."

Joseph DiBenedetto headshot
Joseph DiBenedetto

Divorce and separation lawyer | Apr 30

Relationship: Worked together on matter

"I endorse this lawyer's work. Mario is very competent and considerate of his client's needs. Mario has repeatedly obtained exceptional results for his clients."

View All Endorsements
Joseph Steven Dujmic Jr. headshot
Joseph Dujmic

Divorce and separation lawyer

Michael Robert Gionesi headshot
Michael Gionesi

Divorce and separation lawyer

Lawrence Bruce LaRaus headshot
Lawrence LaRaus

Divorce and separation lawyer

Michael Drew DiFalco headshot
Michael DiFalco

Divorce and separation lawyer

Joshua Bradley Hecht headshot
Joshua Hecht

Divorce and separation lawyer

Barry J. Gross headshot
Barry Gross

Divorce and separation lawyer

Frederick William Vasselman headshot
Frederick Vasselman

Divorce and separation lawyer

Howard M Lewis headshot
Howard Lewis

Divorce and separation lawyer

Karina Alomar headshot
Karina Alomar

Divorce and separation lawyer

Ivan E. Young headshot
Ivan Young

Foreclosure lawyer

Kenneth John Ready headshot
Kenneth Ready

Personal injury lawyer

Jason Adam Isaacson headshot
Jason Isaacson

Divorce and separation lawyer

Matthew Scott Seidner headshot
Matthew Seidner

Divorce and separation lawyer

Jill Altarac headshot
Jill Altarac

Divorce and separation lawyer

Caitlin Donahue headshot
Caitlin Donahue

Family lawyer

Christian Aaron Pickney headshot
Christian Pickney

Divorce and separation lawyer

Joseph DiBenedetto headshot
Joseph DiBenedetto

Criminal defense lawyer

Brian C. Pascale headshot
Brian Pascale

Personal injury lawyer

Experience

Rating:  10.0 (Superb)

Honors

2025

Super Lawyer, Super Lawyers

2024

Super Lawyer, Super Lawyers

2023

Super Lawyer, Super Lawyers

2022

Super Lawyer, Super Lawyers

2021

Super Lawyer, Super Lawyers

2020

Super Lawyer, Super Lawyers

2019

Super Lawyer, Super Lawyers

2018

Super Lawyer, Super Lawyers

2017

Super Lawyer, Super Lawyers

2016

Rising Star, Super Lawyers

2015

Rising Star, Super Lawyers

2014

Top 40 Under 40, The National Trial Lawyers

2014

2014 New York Metro Rising Stars, SuperLawyers

2014

Top Ten Ranking, The National Academy of Family Law Attorneys

2014

Top 40 Lawyer Under 40, The American Society of Legal Advocates

2014

Rising Star, Super Lawyers

2004

Award for Trial Advocacy, The Association of the Bar of the City of New York

2003

Army Commendation Medal, Trial Defense Service, United States Army

2003

Bronze Star Medal, Fourth Infantry Division, United States Army

2002

Army Commendation Medal, Fourth Infantry Division, United States Army

Work Experience

2009 - Present

Partner, Stern & DeRossi, LLP

2006 - 2009

Associate, Stern, Adler & Associates, LLP

2002 - 2006

Judge Advocate, United States Army

Associations

2014 - Present

The National Academy of Family Law Attorneys

Member

2014 - Present

The American Society of Legal Advocates

Me

2009 - Present

Nassau County Bar Association

Member

2009 - Present

New York State Bar Association, Family Law Section

Member

2009 - Present

Columbian Lawyers Association

Member

Education

2001

Saint John's University, School of Law

Juris Doctor

Languages

English

Activity

Avvo Rating

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Avvo Rating Levels
10.0 - 9.0 Superb8.9 - 8.0 Excellent7.9 - 7.0 Very Good6.9 - 6.0 Good5.9 - 5.0 Average4.9 - 4.0 Concern3.9 - 3.0 Caution2.9 - 2.0 Strong Caution1.9 - 1.0 Extreme Caution