ABOUT 32BJ SEIU. 32BJ SEIU is the largest property service workers union in the country, representing more than 175,000 workers in various industries. Our members come from diverse backgrounds and are united in the fight for fairness and decency. We have a strong presence in twelve states and Washington, DC, with members working in residential buildings, commercial offices, airports, schools, theaters, and more. Our mission is to build a more jus...