Steamfitters Local Union #449
Sprinkler Fitters Local 542
Sheet Metal Workers Local Union 12
United Union of Roofers, Waterproofers & Allied Workers Local Union #37
Plumbers and Pipefitters Local Union 354
Plumbers Local #27
OPCMIA Local #526
Operating Engineers Local #66
Laborers District Council of Western PA
Iron Workers Local Union No. 3
International Association of Heat and Frost Insulators and Allied Workers Local #2
Cement Masons Local Union 526
Greater PA Regional Council of Carpenters
Bricklayers and Allied Craftworkers Local 9 PA
Boilermakers Local 154
International Union of Painters and Allied Trades (IUPAT) D.C. #57
I.B.E.W. Local Union No. 5
