| Business | Phone |
| Ibew 1211 Wiley Blvd Sw, Cedar Rapids 52404 | (319) 366-0702 |
| Labor Unions Afscme 1211 Wiley Blvd Sw, Cedar Rapids 52404 | (319) 390-5450 |
| United Automobile Workers Cedar Rapids 52404 | (319) 362-2590 |
| Sheet Metal Workers 263 1211 Wiley Blvd Sw, Cedar Rapids 52404 | (319) 396-8045 |
| Plumber's & Steamfitters Union 5101 J St Sw, Cedar Rapids 52404 | (319) 363-1263 |
| Bakery & Confectionery Workers 5000 J St Sw, Cedar Rapids 52404 | (319) 366-2232 |
| Hawkeye Labor Council Afl-Cio 1211 Wiley Blvd Sw, Cedar Rapids 52404 | (319) 396-8461 |
| Five River Carpenters Health 1831 16th Ave Sw, Cedar Rapids 52404 | (319) 366-3623 |
| Bricklayers Of Iowa 1211 Wiley Blvd Sw, Cedar Rapids 52404 | (319) 396-4795 |
| Cedar Rapids Building & Constr 1211 Wiley Blvd Sw, Cedar Rapids 52404 | (319) 396-7953 |
| Chauffeurs Teamsters & Helpers 5000 J St Sw, Cedar Rapids 52404 | (319) 365-1461 |
| Communications Workers-America 1211 Wiley Blvd Sw, Cedar Rapids 52404 | (319) 396-2593 |
| Laborers Local Union 43 5000 J St Sw, Cedar Rapids 52404 | (319) 366-0859 |