Representing more than 41,000 healthcare workers throughoutMassachusetts, and 370,000 workers inMassachusetts,New York,Maryland,New Jersey,Florida, andWashington,D.C., 1199SEIU United Healthcare Workers East is the largest and fastest-growing healthcare union inAmerica. Our mission is to achieve affordable, high quality healthcare for all. 1199SEIU is part of the 2.1 million member Service Employees International Union.