David S. Ostern represents and advises employers in all areas of labor and employment law. He focuses his practice on traditional labor law and defending employers against federal and state harassment, discrimination, and retaliation-related employment litigation.

David’s traditional labor law experience involves assisting local and national clients in:

  • Labor management relations training
  • Union organizing drives and National Labor Relations Board elections and hearings
  • Labor arbitration (contract administration and grievance matters)
  • Unfair labor practice charges

David also actively defends employers in a variety of matters in both New Jersey and New York state and federal courts and before governmental agencies including the New York State Division of Human Rights. David defends clients against claims arising from Title VII of the Civil Rights Act, the American with Disabilities Act, the Family and Medical Leave Act, and similar state and local laws (e.g., New Jersey Law Against Discrimination).

David is also a member of Littler’s Workplace Policy Institute (WPI). WPI assists the employer community in understanding and impacting legislation and regulation at the state and federal levels.

During law school, David was a summer associate at Littler, where he helped draft a successful petition for certification to the Supreme Court of New Jersey. He served as a judicial intern to the Hon. Frank J. DeAngelis, Superior Court of New Jersey – Morris, as well as a labor relations legal intern at Metro-North Railroad. David oversaw the digitization of journal publications and restructuring of journal policies and leadership roles as editor-in-chief of the Cardozo International & Comparative Law Review.

Before attending law school, David worked as a paralegal during the summer and winter for a Manhattan-based law firm specializing in insurance, reinsurance, and commercial litigation.

Professional & Community Affiliations


American Bar Association


New Jersey State Bar Association


New York State Bar Association


Recipient, Jacob Burns Medal

Benjamin N. Cardozo School of Law

May 2020

Recipient, Dean's Merit Scholarship

Benjamin N. Cardozo School of Law


News, Analysis & Press

WPI Labor Day Report 2023

WPI Report

September 5, 2023

WPI Labor Day Report 2022

WPI Report

September 5, 2022

Speaking Engagements

Labor and Employment Law Update for N.J. Contractors

N.J. Electronic Life Safety Association Annual Conference, Atlantic City

February 25, 2022

Labor and Employment Law Update for N.J. Contractors

N.J. Electronic Life Safety Association Webinar

September 14, 2021


  • J.D., Benjamin N. Cardozo School of Law, 2020
  • B.A., State University of New York at Binghamton, 2017magna cum laude

Bar Admission

New Jersey
New York


  • U.S. District Court, District of New Jersey
  • U.S. District Court, Southern District of New York
  • U.S. District Court, Eastern District of New York