| Business | Phone |
| American Federation-State Empl 2525 E Euclid Ave, Des Moines 50317 | (515) 266-3073 |
| American Federation-State Empl 4320 Nw 2nd St, Des Moines 50313 | (515) 246-1517 |
| Asbestos Workers Local 74 1501 E Aurora Ave, Des Moines 50313 | (515) 265-4274 |
| Municipal Laborers 2121 Delaware Ave, Des Moines 50317 | (515) 265-6131 |
| Bricklayers & Allied Crafts 2425 Delaware Ave, Des Moines 50317 | (515) 262-7445 |
| Building Laborers 2121 Delaware Ave, Des Moines 50317 | (515) 265-2558 |
| Carpenter's Local Union 106 3851 Delaware Ave, Des Moines 50313 | (515) 262-8079 |
| Carpenters 2160 E Douglas Ave, Des Moines 50313 | (515) 265-3467 |
| Cement Masons & Plasterers 1501 E Aurora Ave, Des Moines 50313 | (515) 266-1668 |
| Nalc Branch 107 Jefferson Ave, Des Moines 50314 | (515) 282-3723 |
| Operating Engineers 4880 Hubbell Ave, Des Moines 50317 | (515) 265-1657 |
| Communications Workers-America 3612 Sw 9th St, Des Moines 50315 | (515) 243-7102 |
| Ia Ne Western Il Intl Union 5738 Nw 2nd St, Des Moines 50313 | (515) 289-0570 |
| Ibew 1435 Ne 54th Ave, Des Moines 50313 | (515) 265-6193 |
| Ibew 850 18th St, Des Moines 50314 | (515) 243-1924 |
| International Assoc-Machinists 2000 Walker St J, Des Moines 50317 | (515) 265-0344 |
| Plumbers & Steamfitters 2501 Bell Ave, Des Moines 50321 | (515) 243-3244 |
| Des Moines Local American 1200 E Euclid Ave, Des Moines 50316 | (515) 265-7371 |
| Iowa Federation Of Labor 2000 Walker St A, Des Moines 50317 | (515) 262-9571 |
| Iron Workers Af Of L 1501 E Aurora Ave, Des Moines 50313 | (515) 262-9366 |
| Iron Workers Shopmen's 1501 E Aurora Ave, Des Moines 50313 | (515) 266-3194 |
| Iron Workers Welfare Funds 1501 E Aurora Ave B, Des Moines 50313 | (515) 282-4293 |
| Roofers 3802 6th Ave, Des Moines 50313 | (515) 244-7017 |
| Sheet Metal Training Ctr 4534 Nw 6th Dr, Des Moines 50313 | (515) 282-5057 |
| Sheet Metal Workers 2425 Delaware Ave, Des Moines 50317 | (515) 262-7421 |
| South Central Iowa Federation 300 E Locust St 120, Des Moines 50309 | (515) 265-1862 |
| Teamsters 525 6th Ave, Des Moines 50309 | (515) 282-7627 |
| Teamsters General Drivers 90 2425 Delaware Ave, Des Moines 50317 | (515) 262-3194 |
| Teamsters Local Union 120 2425 Delaware Ave, Des Moines 50317 | (515) 262-9715 |
| Teamsters Local Union 147 Des Moines 50317 | (515) 262-9711 |
| United Auto Workers 4589 Nw 6th Dr, Des Moines 50313 | (515) 283-1784 |
| United Auto Workers Sub Region 3330 E 33rd St # 10, Des Moines 50317 | (515) 265-9877 |
| United Electrical Radio & Mach 2905 1/2 Hubbell Ave, Des Moines 50317 | (515) 299-9836 |
| United Steelworkers Of America 125 Nw Broadway Ave, Des Moines 50313 | (515) 288-9547 |
| United Steelworkers Of America 2017 Southlawn Dr, Des Moines 50315 | (515) 953-0783 |
| United Steelworkers Of America 2727 E Market St, Des Moines 50317 | (515) 262-4935 |
| United Transportation Union 513 E 6th St D, Des Moines 50309 | (515) 282-9289 |