shop steward
From Longman Dictionary of Contemporary EnglishRelated topics: Labour relations, unionsshop stewardˌshop ˈsteward noun [countable] BELa worker who is elected by members of a trade union in a factory or other business to represent them in dealing with managersExamples from the Corpusshop steward• Remember, this is an election for shop steward.• The shop steward had ordered fancy new machines and given virtually everyone in manufacturing a big raise.