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 103 reviews | Advocacy
Posted by anonymous | December 15, 2020 | Hired Attorney | Wrongful Termination
The Best in the Business
After being wrongfully terminated from my employer I interviewed five counselors to represent me. I am very fortunate to have chosen Jonathan. Jonathan was a zealous advocate for my cause and produced impressive results in an efficient manner. The personal touch and care for my situation was unexp...
Posted by Jean | December 11, 2020 | Hired Attorney | Employment & Labor
Employment and labor, Arbitration, Litigation Attorney
Mr. Sack was at all times forthright, direct and concerned about my case. I was laid off due to Covid 19 and Mr. Sack negotiated with the Human Resources Department at my institution for a greater severance. While this was ultimately unsuccessful I have the utmost faith in Mr. Sack for his knowledgea...
Posted by Susan | November 30, 2020 | Hired Attorney | Lawsuits & Disputes
Excellent attorney -professional, supportive and kind
Mr Sack is an amazing attorney. He has the ability to make you feel at ease and let you feel heard. Mr Sack provided me with peace of mind during a stressful and uncertain time. His knowledge of the law, calming personality, kindness and great sense of humor allowed me to feel that I was worth figh...
Posted by anonymous | November 18, 2020 | Hired Attorney
Supportive and determined
Jonathan helped me through a difficult time. He was professional, supportive and knew how to get the job done. I feel privileged to have had a great lawyer on my side. Thank you Jonathan.
Posted by Christopher | November 16, 2020 | Employment & Labor
Non Compete Assistance
Jon was excellent at helping me interpret and deal with a non compete issue. His knowledge of these issues is unparalleled compared attorneys with whom I have dealt on similar matters. He also helped me negotiate a new employment agreement in detail. I recommend him highly.
"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