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 61 - 65 of 109 reviews | Employment & Labor
Posted by anonymous | April 15, 2020 | Hired Attorney
Director
Jonathan has been my counselor for most of my career in Wall Street, dating back over 20 years. He is the lawyer that you want when you need someone to give you confidence. He will calm the storm, prepare you for your next move, and help you obtain a favorable outcome. He has helped me secure better ...
Posted by anonymous | March 28, 2020 | Hired Attorney
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
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 anonymous | January 24, 2020 | Hired Attorney
Breastfeeding/maternity discrimination case
I contacted Jonathan the day after (and the day before Xmas eve) I got fired from my job in finance about 6 weeks after I returned from my maternity leave. I was berated when I told my employer I was pregnant. Was asked why I didn't tell them when they had interviewed me. My bosses first response...
Posted by anonymous | December 16, 2019 | Hired Attorney
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.
"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