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 21 - 25 of 34 reviews | Responsiveness
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 anonymous | December 04, 2019 | Hired Attorney | Employment & Labor
Severance and non-compete negotiation
I work in the hedge fund industry and hired Jonathan to negotiate the terms of my separation with my previous employer. Always responsive and generous with his time, Jonathan fought hard to get me better terms and dramatically reduced my non-compete time. He deals with the big names at every firm, an...
Posted by anonymous | September 23, 2019 | Discrimination
Reliable counsel for years
The first time I went to Jonathan Sack, I was pregnant and my employer was threatening to fire me. Jonathan wrote a letter to my employer on his letterhead, and that was the end of the threats; my job was saved. That was 12 years ago. Since then, he is my go to counsel for discrimination and other wo...
Posted by anonymous | June 17, 2019 | Employment & Labor
anonymous
Jonathan was referred to me by two friends, independently and i see why. He is the epitome of helpful, responsive and efficient. Jonathan was able to guide me on an employment matter in short order, was generous with his time and expertise. After our conversations, i felt confident moving forward wit...
Posted by anonymous | June 04, 2019 | Employment & Labor
A True Professional
Jonathan was exceedingly generous with his time and offered helpful and sound advice. He has a thorough understanding of all elements of employment law and is an expert in this space. His consultation was thoughtful and he took the time to help me see all aspects of my particular situation. He is ext...
"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."
No Endorsement Data Available Yet
This attorney hasn't created any attorney endorsements recently on Avvo.
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