Our Union

SEIU 105 is one of the fastest-growing unions in Colorado, growing by over 50% over the last five years, representing over 8,000 healthcare, janitorial, security, and airport workers throughout the state and the southwest.

Founded in 1939, we are united by the belief in the dignity and worth of workers and the services they provide and dedicated to improving the lives of workers and their families and creating a more just and humane society.

About Service Employees International Union (SEIU)

The Service Employees International Union is an organization of 2 million working people united by the belief in the dignity and worth of workers and the services they provide and dedicated to improving the lives of workers and their families and creating a more just and human society.

Our 2 million members in the United States, Canada, and Puerto Rico include:

Health Care

hospital, mental health, nursing home, clinic, and home care workers

Public Employees

federal, state, county municipal and school employees

Property Service

janitors, security officers, and elevator operators

Industrial and Allied

laundries, light industrial and manufacturing

Members of SEIU work as nurses, doctors, social service workers, mental health workers, building cleaners, police and security officers, librarians, head start employees, maintenance workers, lab technicians, nurse assistants, and more.

SEIU represents a diverse membership. A majority of the members are women. Some 20 percent are African American. SEIU represents more immigrant workers than any other union in the U.S.

There are more than 300 SEIU local affiliates and 25 state councils.