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 141 - 145 of 177 reviews
Posted by Mason | March 05, 2018 | Hired Attorney | Insurance
Employment and severance star
I had problems with a big name, Private Equity-backed form in the fminsurance space and Jonathan dug in to understand why had happened. He then predicted the outcome including timing and did everything he said he would do. Worked hard and professionally for me. Result was exactly as predicted up fron...
Posted by anonymous | February 15, 2018
A Powerful Advocate
Jonathan is a powerful advocate with a laser like focus on what has to be done and how it will get done. At a very vulnerable time I left his office with a renewed confidence on what my rights were and how I should work my way through the process.
Posted by anonymous | February 08, 2018 | Hired Attorney | Employment & Labor
Outstanding employment attorney
Jonathan represented me when I was let go from my employer. He has excellent knowledge of legal nuances and helped me negotiate favorable settlement terms. Jonathan is very smart, professional, confident while at the same time compassionate and wants to get to a fair answer. He helped guide me throu...
Posted by anonymous | December 20, 2017 | Hired Attorney
The Best
You cannot ask for a better person in your corner than Jonathan. He is beyond passionate, fiercely loyal and helped me get my due. I cannot recommend him highly enough.
Posted by anonymous | December 19, 2017 | Hired Attorney | Lawsuits & Disputes
A superb, tenacious and effective attorney
Jonathan offered the ideal combination of immense expertise, wise counsel and unflinching effective advocacy in handling my case. He did so with both immense professionalism and humanity and handled the case absolutely as well as could have been hoped. He was responsive and I am deeply grateful to ...
"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