Photo of Mark Theodore

Mark Theodore is a partner in the Labor & Employment Law Department. He has devoted his practice almost exclusively to representing management in all aspects of traditional labor law matters throughout the U.S. He is Co-Chair of Proskauer’s Labor-Management and Collective Bargaining Practice Group.

Some recent highlights of his career include:

  • Successfully defended client against allegations that it had terminated a union supporter and isolated another. T-Mobile USA, Inc., 365 NLRB No. 15 (2017).
  • Successfully appealed NLRB findings that certain of client’s written policies violated the National Labor Relations Actions Act.  T-Mobile USA, Inc., 363 NLRB No. 171 (2016), enf’d in part, rev’d in part 865 F.3d 265 (5th Cir. 2017).
  • Represented major utility in NLRB proceedings related to organizing of planners.  Secured utility-wide bargaining unit. Bargained on behalf of grocery chain.  After negotiations reached an impasse, guided the company through lawful implementation of five year collective bargaining agreement.
  • Coordinated employer response in numerous strike situations including a work stoppage across 14 western states of the client’s operations.

Mark has extensive experience representing employers in all matters before the NLRB, including representation petitions, jurisdictional disputes and the handling of unfair labor practice charges from the date they are filed through trial and appeal. Mark has acted as lead negotiator for dozens of major companies in a variety of industries, including national, multi-unit, multi-location, multi-employer and multi-union bargaining. Mark has handled lockout and strike situations, coordinating the clients efforts.

In addition, Mark has handled hundreds of arbitrations involving virtually every area of dispute, including contract interest arbitration, contract interpretation, just cause termination/discipline, benefits, pay rates, and hours of work.

On March 29, 2024, the Department of Labor Occupational Safety and Health Administration (“OSHA”) released a final rule amending the Occupational Safety and Health Act of 1970 (“OSH Act”), clarifying who can serve as an employee representative to accompany the OSHA Compliance Safety and Health Officer (“CSHO”) during physical workplace

As we previously reported in April 2022, the National Labor Relations Board (“NLRB” or “Board”) General Counsel, Jennifer Abruzzo, asked the Board to revive the Joy Silk doctrine (which was rejected in 1969) and require employers to recognize unions without a secret ballot election. 

On August 25, 2023, the Board

Late summer brings picnics, hiking, and general fun. It also brings a slew of NLRB decisions as the agency’s fiscal year comes to an end on September 30. One of the more highly-anticipated decisions concerns the lawfulness of employer work rules. On August 1, 2023, the National Labor Relations Board

Following the National Labor Relations Board’s (“NLRB”) highly-controversial decision in McLaren Macomb declaring most confidentiality and non-disparagement clauses in separation agreements to be unlawful, General Counsel Abruzzo this week declared her intention to seek to invalidate nearly all post-employment non-compete agreements, in a memorandum stating her prosecutorial position that