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 11 - 15 of 109 reviews | Employment & Labor
Posted by Jim | April 11, 2023 | Hired Attorney | Employment & Labor
Exceptional counsel
I have worked with Jonathan for years now after decades in the financial industry. He is by far the most skillful, confident labor contract lawyer I have found. I highly recommend him.
Posted by James | December 12, 2022 | Hired Attorney | Employment & Labor
Best Lawyer there is for Financial Services related issues!
I was recently wrongfully terminated from a large Investment Bank the week of Thanksgiving and was referred to Jonathan by a friend and could not have been more grateful to have Jonathan on my side. Jonathan and his team diligently worked on my behalf while in the midst of the holiday season to ...
Posted by JRodriguez | October 04, 2022 | Employment & Labor
Genuinely Cares
Jonathan genuinely cares about your best interest. He will be honest and forward with you to make sure nothing is left unclear. He counseled me on an employment matter and helped guide me to a more beneficial outcome. His words of wisdom are still reverberating with me every day as I move forward....
Posted by anonymous | September 27, 2022 | Hired Attorney | Employment & Labor
Executive
Jonathan is fantastic. I used him when I was wrongfully terminated two years ago and again this year. He is more than a lawyer. He is a confidante and an advisor. He gets results because he is thorough but he is also a great sounding board for smaller issues. He is fearless on behalf of his clients. ...
Posted by anonymous | September 22, 2022 | Employment & Labor
Knowledgeable and Responsive
A contact and previous client referred me to Jonathan Sack. I had a complex separation agreement. Jonathan reviewed the agreement in detail, advised me on my options, and took the time to walk me through everything and answered all my questions. Prior to connecting with Jonathan, the ambiguity and co...
"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