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- AMIEU: Australasian Meat Industry Employees' Union SA & WA Branch
- AMWU: Australian Manufacturing Workers' Union - WA Branch
- ASU: Australian Services Union - WA Branch
- BBEIUW WA: Breweries & Bottleyards Employees Industrial Union of Workers WA
- CFMEU Construction Division: Construction Forestry Mining and Energy Union Construction and General Division - WA Branch
- CFMEU Forestry & Furnishings Division: Construction Forestry Mining and Energy Union Forestry & Furnishings Products Division - WA Office
- Mining & Energy Union WA
- CPSU/CSA: Community & Public Sector Union – Civil Service Association
- CPSU/PSU: Community & Public Sector Union - Public Sector Group - WA Branch
- ETUWA: Electrical Trades Union WA
- FAAA: Flight Attendants’ Association of Australia – National Office
- FSU: Finance Sector Union of Australia - WA Local Office
- HSUWA: Health Services Union of Western Australia
- IEU: Independent Education Union of Australia WA Branch
- MEAA: Media Entertainment and Arts Alliance - WA Branch
- NTEU: National Tertiary Education Industry Union - WA Division
- PPTEU: Plumbing and Pipe Trades Employees Union
- Professionals Australia (Formerly: Association of Professional Engineers, Scientists & Managers, Australia)
- RTBU: Rail, Tram and Bus Industry Union - WA Branch
- SDA: Shop Distributive & Allied Employees Association
- SSTUWA: State School Teachers' Union of Western Australia
- TWU: Transport Workers Union
- UCIW: Union of Christmas Island Workers
- UPFUWA: United Professional Firefighters Union of Australia - WA Branch
- United Workers Union (previously United Voice)
- WAGHSOA: WA Grain Handling Salaried Officers Association
- WAPOU: Western Australian Prison Officers' Union of Workers
- WA Police Union
- MUA WA: Maritime Union of Australia - WA Branch