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 41 - 45 of 50 reviews | Lawsuits & Disputes
Posted by Perrin | October 26, 2017 | Hired Attorney | Lawsuits & Disputes
Great advice
I know that Jon and his team were working for me and with me. We spent almost 3 years and eventually settled. I always felt that Jon and Michael Mui had my best interests at heart and I was very satisfied with their performance.
Posted by anonymous | October 11, 2017 | Hired Attorney | Lawsuits & Disputes
Confidence boost
Jonathan advised me through the negotiation of a structurally complicated situation. Gave valuable advice on negotiating, which in the end came to a resolution for which he did not need to get involved directly and for which he only charged a small fee to review the agreements. Yes, he can be very to...
Posted by Dennis | October 09, 2017 | Hired Attorney | Lawsuits & Disputes
Fierce Advocate
I first became aware of Jonathan when he represented a former employee of my then current firm. I was head of HR and dealt with the matter for the firm. I had seen him in action from the "other" side. Several months later when I needed a lawyer, he was my first and only choice and it was a good on...
Posted by anonymous | October 08, 2017 | Hired Attorney | Lawsuits & Disputes
Public Company Director
Jonathan has the experience, toughness and dedication to fight for you. He won't waste your time, he will tell you the truth when it comes to your case, both good and bad. I highly recommend him and his team. I want him on my side in any dispute. He was recommended to me by one of the top corpor...
Posted by jean | October 03, 2017 | Hired Attorney | Lawsuits & Disputes
A true professional and a fighter
I have been Jon's client for 4 years on couple high stake cases. He truly delivers big. He is a hard worker and has been always available rain or shine. His partners Eric Stern and Michael Mui are on top of their game and have a true insight on how the case is going and how to push it to a win. ...
"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