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 161 - 165 of 177 reviews
Posted by anonymous | October 05, 2017 | Hired Attorney | Discrimination
A true advocate for the abused employee
While sometimes a bit rough and overly aggressive, Jonathan has a proven track record of advocating on behalf of those who have either been victims of discrimination or have had their employers withhold payments to them. In these types of cases the law is clear, but the little guy or gal is at a big ...
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. ...
Posted by anonymous | October 02, 2017 | Hired Attorney | Employment & Labor
best of breed -- poised to be your advocate
I interviewed 9 attorneys before hiring Jonathan. I chose him because I wanted an advocate, a champion and someone who had my back. When working in a hostile environment where 'employment' means uncivil and zero-sum treatment, you want a coach to direct you through, give you a game plan and assure...
Posted by anonymous | April 06, 2017 | Hired Attorney
Delivered
Jonathan helped my family during a difficult time. Yes, he is edgy, yes he is a bulldog, but one with a big heart. He is someone you want on your team.
Posted by anonymous | August 28, 2020 | Hired Attorney | Employment & Labor
No Nonsense Advocate
Jonathan provided the support I needed through a tough time. He was direct and fearless when advocating for my rights with a former employer. He takes a no-nonsense approach to get things done and is well-balanced by a team that fights equally as hard with care and compassion. He gave me practical...
"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