| Business | Phone |
| Aerospace Machinist 9125 15th Pl S, Seattle 98108 | (206) 763-1300 |
| Aircraft Mechanics Fraternal 2800 S 192nd St, Seattle 98188 | (206) 439-0300 |
| Amalgamated Transit Union 2815 2nd Ave 230, Seattle 98121 | (206) 448-8588 |
| Association Of Flight Atndnts 1406 Ne 50th St 204, Seattle 98105 | (206) 523-3091 |
| Bakery & Confectionery Workers 5950 6th Ave S, Seattle 98108 | (206) 768-9990 |
| Intl Brotherhood-Boilermakers 6770 E Marginal Way S B122, Seattle 98108 | (206) 624-4707 |
| Cannery Workers Union 1711 W Nickerson St, Seattle 98119 | (206) 284-5321 |
| Carpenters Union 209 Vine St, Seattle 98121 | (206) 441-1310 |
| Carpet Layers Union 2819 1st Ave, Seattle 98121 | (206) 441-4046 |
| Carpet Linoleum & Soft Tile 16000 Christensen Rd 100, Seattle 98188 | (206) 957-1892 |
| Cement Masons 552 Denny Way # 102, Seattle 98109 | (206) 441-9386 |
| Communications Workers-America 2122 3rd Ave, Seattle 98121 | (206) 441-7800 |
| Deep Sea Fishermen's Union 5215 Ballard Ave Nw, Seattle 98107 | (206) 783-2922 |
| Elevator Constructors Local 2112 Thorndyke Ave W, Seattle 98199 | (206) 282-4885 |
| Sandra England 2800 1st Ave, Seattle 98121 | (206) 443-1750 |
| Bricklayers Local #1 15208 52nd Ave S, Seattle 98188 | (206) 248-2456 |
| Bricklayers Union 6314 7th Ave S, Seattle 98108 | (206) 762-1166 |
| Ltd Properties 222 Wall St, Seattle 98121 | (206) 441-1850 |
| Greater Seattle Area Local 132 Sw 153rd St, Seattle 98166 | (206) 241-6038 |
| Fiea Local 12510 33rd Ave Ne G, Seattle 98125 | (206) 361-8980 |
| Laborers Street Pavers 565 13th Ave, Seattle 98122 | (206) 329-1540 |
| Highline Education Assn 15210 32nd Ave S A, Seattle 98188 | (206) 246-4340 |
| Glaziers & Glassworkers Local 2819 1st Ave # 310, Seattle 98121 | (206) 441-4633 |
| Glaziers & Glassworkers Local 16000 Christensen Rd 100, Seattle 98188 | (206) 957-1882 |
| Hod Carriers & General Laborer 2800 1st Ave 50, Seattle 98121 | (206) 441-0470 |
| Hotel Employees & Restaurant 2800 1st Ave 3, Seattle 98121 | (206) 728-2326 |
| Iam District Lodge 9121 15th Pl S, Seattle 98108 | (206) 764-0312 |
| Ibew 2700 1st Ave # 104, Seattle 98121 | (206) 441-4600 |
| Ibew 321 16th Ave S, Seattle 98144 | (206) 323-4505 |
| Ibu-Employer Hiring & Dispatch 1711 W Nickerson St D, Seattle 98119 | (206) 284-7393 |
| Ifpte Local Seattle 98122 | (206) 329-1745 |
| Industrial Workers-World 5215 Ballard Ave Nw, Seattle 98107 | (206) 706-6250 |
| Inlandboatmen's Union/Pacific 1711 W Nickerson St D, Seattle 98119 | (206) 284-5040 |
| International Assoc-Machinists 19215 28th Ave S, Seattle 98188 | (206) 878-5498 |
| International Brotherhood 101 Elliott Ave W 500, Seattle 98119 | (206) 441-7050 |
| International Longshoremen's 2414 Sw Andover St F100, Seattle 98106 | (206) 728-1948 |
| International Longshoremen's 3440 E Marginal Way S, Seattle 98134 | (206) 623-7844 |
| International Masonary Inst 6770 E Marginal Way S, Seattle 98108 | (206) 767-3986 |
| International Organization 2333 3rd Ave, Seattle 98121 | (206) 441-8700 |
| Ilwu Local 19 3440 E Marginal Way S, Seattle 98134 | (206) 624-3963 |
| Iron Workers Local 4550 S 134th Pl 102, Seattle 98168 | (206) 248-4246 |
| Iron Workers Shopmen's Local 2800 1st Ave 230, Seattle 98121 | (206) 441-5060 |