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 31 - 35 of 47 reviews | Professionalism
Posted by anonymous | January 30, 2019 | Hired Attorney | Discrimination
Great Lawyer
Jonathan and his Firm provided excellent services, demonstrated professionalism, expertise, and personal attention to the details while handling discriminatory case for me. Jonathan was helpful, technical, and responsive to all my questions and concerns. Thank you once again on doing a great job! I ...
Posted by anonymous | December 20, 2018 | Hired Attorney | Discrimination
Jonathan Sack delivers !
I engaged Jonathan and his team to assist with an age and gender discrimination situation at my former firm. Jonathan was responsive and supportive. He was with me every step of the way, and were ultimately vindicated. Jonathan is a straight shooter. He brings decades of experience to the table. ...
Posted by anonymous | August 30, 2018 | Hired Attorney | Employment & Labor
Immediately (within 10 minutes) fixed a very serious issue for me!
I was put in touch with Jonathan after my previous firm threatened me with legal action regarding a contract policy. Jonathan immediately jumped on the case and had an email prepared within minutes to address the firm's issues. His email was clear, concise, and got the message across. He believed the...
Posted by Claudio | April 06, 2018 | Hired Attorney | Lawsuits & Disputes
"Who you gonna call?"
I have been in finance for over 35 years and this was my first dispute/litigation/arbitration. Jonathan was about as professional as I have seen anyone. He asked the right questions, designed a clear, effective game plan and then executed very well. He becomes emotionally vested in his cases and h...
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...
"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