Sound Alliance’s dues-paying member institutions benefit from the leadership development of their own people, and believe in taking action for the common good together.
- Amalgamated Transit Union Local 587
- Diocese of Olympia - Episcopal Church in Western Washington
- Federal Way Education Association
- Friends of the Sound Alliance
- El Comite
- Health Equity Circle
- IBEW Local 46
- International Association of Heat & Frost Insulators & Allied Workers
- Interpreters United Local 1671, WFSE/AFSCME Council 28
- Saltwater Unitarian Universalist Church
- Seattle Education Association
- Society of Professional Engineering Employees in Aerospace (SPEEA)
- St. Francis of Assisi Church
- St. John United Lutheran Church
- St. Mary's Catholic Church
- St. Vincent de Paul Catholic Church
- St. Vincent de Paul Society of Seattle/King County
- Washington State Building & Construction Trades Council
- Washington Pipe Trades
- Wayside United Church of Christ