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 66 - 70 of 177 reviews
Posted by Okke | February 18, 2021
Great advice
Jonathan gave me some great advice during the free consultation! He explained clearly what my options where and what to do next.
Posted by anonymous | February 05, 2021 | Hired Attorney | Lawsuits & Disputes
An Exceptional Attorney with Conviction and Compassion
Jonathan is a truly exceptional attorney. His experience and expertise were profoundly impactful in the successful outcome of my case. In addition, his compassion and ardent support from beginning to end was incredible. In a period of professional/career crisis, he was unwavering in serving my bes...
Posted by anonymous | February 03, 2021 | Lawsuits & Disputes
Knowledgeable, compassionate, honest, always available
Jonathan was compassionate and clear with me. He gave me the courage and guidance I needed to take immediate and effective action to manage my options. Because he was so clear, I was able to hear that I had power and I was able to exercise it. I knew he was available if I needed him--and he was--even...
Posted by Jonathan | January 27, 2021 | Wrongful Termination
Goog guidance
Getting laid off is like having the lights turned off on you. Mr. Sack was like a flash light - he mapped out my options clearly and detailed pathways towards a reasonable exit, with zero minced words and zero nonsense. It was valuable to have an honest opinion on where I stood legally.
Posted by anonymous | January 21, 2021 | Hired Attorney | Employment & Labor
Managing Director
Having worked with several top rated employment attorneys over the years in various capacities, I can attest Jonathan was outstanding. He not only has a deep knowledge and command of employment law, but he is thoughtful, patient and persistent. He guided me through a complex situation that played out...
"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