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
176 Client Reviews
Showing 1 - 5 of 176 reviews
Posted by anonymous | February 13, 2026 | Hired Attorney | Lawsuits & Disputes
Jonathan Sack is the “real deal”
Jonathan Sack actually listened to us. He took the time to understand the inequity of our situation. He was the person calling and emailing us in between huge case trials to give us advice. His advice was on point. We had other attorneys shy away from the big bank employee name but Jonathon rose ...
Posted by Andrew | October 30, 2025 | Hired Attorney
We needed help fast and Jonathan got it done.
Jonathan's experience is apparent. He cuts through the noise. He is very well connected. His whole team is engaged. And he gets results.
Posted by anonymous | March 19, 2025
Incredibly User Friendly
Jonathan is truly one of the best. When I reached out to him for advice not only did he take the call quickly, but he did also so in a way that was thoughtful and comprehensive. He helped my partner and me think through the specifics of the situation and laid out what he believed to be the best pat...
Posted by Jonathan | March 18, 2025 | Employment & Labor
Excellent experience!
Jonathan recently helped me through an employment contract matter. This was a first time experience for me, and he was extremely friendly, knowledgeable, and provided excellent consultation in an understandable way. The matter was resolved in a timely manner with a very positive outcome, and I woul...
Posted by Ralph | March 11, 2025 | Hired Attorney
Sack Law
Jonathan was decisive; knowledgeable and straight with me. I couldn’t find a better firm to represent me. Thank you Jonathan.
"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