I am a results-oriented, energetic advocate for my clients. I am passionate about representing my clients. As most cases come from word-of-mouth referrals, I am proud of my reputation built one client at a time. Most clients are faced with a difficult challenge in a critical part of their lives: their jobs and careers. I am competitive and look forward to taking the fight to the employer to redress unfair and illegal actions. I align our firm's fee arrangement with the client's desired outcome so that there is an identity of interest in the result sought. My success is defined by each client obtaining the desired outcome as a consequence of my effective counsel. Most of all, I love what I do, and that is helping people and seeking fair results for clients who deserve better treatment from their employers.
5
Practice Areas
37 years | 5,000 cases
37 years | 200 cases
37 years | 400 cases
37 years | 500 cases
33%-40%
State: New Jersey
Acquired: 1989
No misconduct found
State: New York
Acquired: 1989
No misconduct found
State: District of Columbia
Acquired: 1991
No misconduct found
177 Client Reviews
Showing 16 - 20 of 34 reviews | Responsiveness
Posted by anonymous | May 14, 2021 | Hired Attorney
Best there is
Jonathan really listened to me from Day 1; and he and his team provided amazing guidance throughout my entire process. He was always available, no question of mine was too small, and he gave me so much hope during a very difficult time. His entire team is fantastic and made sure that I was comfortab...
Posted by anonymous | September 24, 2020 | Hired Attorney | Employment & Labor
Excellent attorney
Jonathan is a top notch, action oriented, responsive attorney. During the separation with my employer, not only did he provide insightful advice, he really listened to figure out what his main argument points would be and then executed on getting the best deal possible. I would highly recommend Jonat...
Posted by anonymous | July 07, 2020
Client Relationship Manager
I had the pleasure to consult with Mr. Sack. During these uncertain times, he promptly answered my questions and concerns. Followed by our emails he consulted with me on a call to discuss my case. He gave me confidence and assurance to take the proper action. I HIGHLY recommend anyone if you do n...
Posted by anonymous | April 15, 2020 | Hired Attorney
Family Office
Jonathan is an very intelligent and attentive attorney. He will fight for you until everything is made right. After years I still have issues that arise from my matter and he continues to address them in a timely manner. I have recommended him to fellow colleagues and will continue to recommend h...
Posted by Trevyn | January 21, 2020 | Lawsuits & Disputes
Incredible Support
Although i was located in a country with 7 hour time difference, and contacted Jonathan just before Christmas, he was extraordinarily efficient and available to me at all times. Even through the holidays, whilst he travelled with his family, we spoke and mailed regularly. His ability to combine empa...
"Jonathan is one of the most professional, effective, and direct attorneys I have ever met. His knowledge of labor and employment law is vast and very respected. You can't go wrong having him on your team."
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2025
Super Lawyer, Super Lawyers
2024
Super Lawyer, Super Lawyers
2024
Client's Choice, Avvo
2023
Super Lawyer, Super Lawyers
2017
Super Lawyer, Super Lawyers
1986
Dewey Scholarship, Dewey Scholarship
1989 - Present
Partner, Sack & Sack, LLP
1989 - Present
New York State Bar Association
1989
JD - Juris Doctor
1986
BA - Bachelor of Arts
English