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 1 - 5 of 50 reviews | Lawsuits & Disputes
Posted by anonymous | February 13, 2026 | Hired Attorney | Lawsuits & Disputes
Jonathan Sack is the “real deal”
Jonathan Sack actually listened to us. He took the time to understand the inequity of our situation. He was the person calling and emailing us in between huge case trials to give us advice. His advice was on point. We had other attorneys shy away from the big bank employee name but Jonathon rose ...
Posted by anonymous | May 14, 2024 | Lawsuits & Disputes
Honest
Jonathan reviewed my current case and offered me solid advice. I highly recommend him
Posted by anonymous | May 10, 2023 | Lawsuits & Disputes
Thank you Jonathan!
This might be the first review/rating I have ever left for anything, and Jonathan is well deserved for my first review. I cannot thank him enough for his support. He was so responsive and very quick to reply to all my questions. Even after we decided to not move forward with building a case he was st...
Posted by anonymous | February 01, 2023 | Lawsuits & Disputes
A lawyer you can trust!
I feel blessed that was referred to Jonathan. He is not only an unbelievable lawyer, but simply just cares and is passionate about helping people. I am so glad I had Jonathan as my advocate. He knows what is right and no one knows how to handle big corporations better than him to get you what you des...
Posted by Manoj | January 24, 2023 | Hired Attorney | Lawsuits & Disputes
Straight shooter to TdAmeritrade( A trillion dollar firm) !!
TDAmeritrade restricted my brokerage account all of a sudden without specifying any reason, I was shocked. I emailed to 23 litigation attorneys but no was willing to defend my case with a BIG Trillion dollar Firm like TDAmeritrade. I felt hopeless. My Friend referred me to Jonathan Sack, and he happ...
"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