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 51 - 55 of 177 reviews
Posted by anonymous | September 16, 2021 | Hired Attorney | Employment & Labor
Amazed by his ability to help
I am impressed by Jonathan’s professionalism and business strategy used on my case. He is also very responsive which eliminated my anxiety during the whole process. With his extensive experiences in employment law, Jonathan provides an advantage to help the people who have been treated unfairly by th...
Posted by anonymous | August 23, 2021 | Employment & Labor
The best
Jonathan helped me every step of the way to negotiate a separation agreement with my former employee. The issues at hand were gender discrimination and sexual harassment and I'm so thankful for his counsel.
Posted by Josh | August 22, 2021 | Hired Attorney | Employment & Labor
Portfolio Manager - New York
First and foremost, Jonathan got me the positive outcome I asked for at the beginning, and then some. He is results-driven and working with him was the greatest decision I made in connection with leaving my previous employer. I was referred to him from another finance professional, Jonathan was incre...
Posted by anonymous | August 20, 2021 | Hired Attorney
Portfolio Manager
Knowledgeable, vigilant, attentive to detail. Jonathan has a wealth of experience in the field, and brought that to bear to help achieve the desired outcome.
Posted by anonymous | August 19, 2021 | Divorce & Separation
Real estate investment professional
Jonathan consulted on a potential litigation and helped me negotiate a separation agreement before launching a case. He was direct and gave candid feedback that was clearly based on significant experience.
"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."
No Endorsement Data Available Yet
This attorney hasn't created any attorney endorsements recently on Avvo.
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