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 21 - 25 of 34 reviews | General Knowledge
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 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 anonymous | August 14, 2020 | Employment & Labor
Incredibly Helpful
I had the pleasure of consulting with Mr. Sack regarding a tough employment issue. He was kind enough to listen to my situation in detail and fully explain to me the legalities and all of my options. Even though my case could not be brought to litigation, Mr. Sack advised me on how to proceed. I h...
Posted by anonymous | July 06, 2020 | Hired Attorney | Employment & Labor
Wrongful Dismissal
Contacted to help negotiate my severance package and he was patient and knowledgeable through a very nerve racking time for me. Would highly recommend Jonathan
Posted by anonymous | June 08, 2020 | Hired Attorney | Employment & Labor
Tough as nails
Jonathan is a no nonsense, aggressive attorney. He will tell it to you straight even if it’s not what you want to hear but it’s the reality and he knows from years of experience. Jonathan’s tone can be abrupt and to the point, there is no mincing words with him, but you can rest assured, it’s this sa...
"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