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 56 - 60 of 103 reviews | Advocacy
Posted by anonymous | March 28, 2020 | Hired Attorney | Employment & Labor
Family Office
Would not have been able to renegotiate my severance package without him. He was able to move the needle which I was unable to do on my own. He has years of experience and credibility with top employment law firms in NYC. If you think you have received an unfair separation / severance agreement fro...
Posted by anonymous | March 20, 2020 | Hired Attorney | Employment & Labor
Top Employment Lawyer in NYC!
Jonathan was referred to me by a friend for a severance dispute and I could not have been more happy with his work. He cares deeply about getting fair settlements for his clients and is not afraid to take on intimidating corporate lawyers. His years of experience gave me confidence in his ability to...
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...
Posted by anonymous | December 16, 2019 | Hired Attorney | Contracts & Agreements
Highly Recommended
Jonathan Sack helped negotiate a non-compete. He worked tirelessly, was easy to get in touch with, and helped diligently throughout the process. Highly recommended.
Posted by Mark | December 12, 2019 | Hired Attorney | Employment & Labor
Top Notch!
John is the guy you want in your corner. He is fast-working, aggressive and knows how to get the job done. He quickly resolved an HR issue I was unfairly involved with and delivered the outcome I was hoping for.
"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