👉 Teamsters are workers who represent the interests of their employers in collective bargaining with their union. They represent a broad range of industries, including manufacturing, construction, and transportation, and they have been active in labor unions since the early 1900s. In the United States, the teamster movement has played a significant role in shaping the political landscape during the Great Depression and World War II. It is composed of workers who are represented by professional union officials with the support of their employers.