Marathon Martinez USW Workers on Strike After Contract Impasse

April 27, 2026, 7:30 PM UTC

Marathon Petroleum Corp. said it is now operating its Marathon Martinez Renewables plant in California with trained employees after members of United Steelworkers Local 5 began a strike Monday.

  • “A safe and orderly handover to trained and qualified Marathon employees has been completed”: spokesman Jamal Kheiry
  • Marathon said the approximately 115 hourly union workers are on an economic strike in support of the union’s bargaining proposals. The union has called it an unfair labor practices strike
  • Marathon and the union have been in collective bargaining to reach a new labor agreement; the prior work contract expired Jan. 31
  • Martinez Renewables ...

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