SEIU Local 509 represents over 12,000 Human Service workers throughout Massachusetts. Several thousand SEIU 509 members work as professional, direct care, and support staff at private agencies that receive public funding to provide a variety of social services to elders, at-risk children, and people with mental illness and developmental disabilities.
SEIU Local 509 is part of the Service Employees International Union, the largest and fastest-growing labor union in the United States, with 2 million members. Focused on uniting workers in four sectors–-public services, long term care, property services, and hospital systems–-SEIU is the largest health care union, the largest property services union, and the second-largest public employees union.
Important SEIU Local 509 documents:
- SEIU Local 509 Constitution – Amended 3/14/13
- SEIU Local 509 General Election Policies and Procedures – Amended 9/12/12
The SEIU Local 509 Mission Statement:
The objects of this Local Union shall be in general the objects of the Service Employees International Union.
- To unite as Local 509 members within the jurisdiction of the Service Employees International Union for mutual welfare, protection and advancement.
- To work as Union members in the establishment and maintenance of fair wages, hours,working conditions, and professional standards.
- To seek, organize, and unite all workers, eligible for membership herein, for their mutual advancement, both social and economic.
- To advance a mutual understanding of the Local and its activities in the communities in which our members live and work.
- To encourage and support women and members of minority groups to participate fully in the activities of the Local.
- To eradicate discriminatory practices by the employer and society at large.
- To seek to promote, whenever possible, the interests of the client community served by the Union.
- To foster the value of a public commitment for human services and education.
- To seek ways to improve the quality of service we provide.
- To help build a strong labor movement that his reflective of the needs of working men and women.
- To promote and encourage the involvement of members in the political process, including elections and other forms of political activity.

