| Business | Phone |
| A Fl-Co Midwest Region 1323 E Front Ave, Bismarck 58504 | (701) 250-9472 |
| United Transportation Union 750 Augsburg Ave, Bismarck 58504 | (701) 223-0061 |
| Teamsters Local Union 1100 Basin Ave, Bismarck 58504 | (701) 223-6943 |
| Bricklayers & Allied Bismarck 58501 | (701) 255-6335 |
| Carpenter's Union Local 217 S Mandan St, Bismarck 58504 | (701) 255-3701 |
| Communications Workers-America 418 E Rosser Ave, Bismarck 58501 | (701) 258-8222 |
| Pace Local 1323 E Front Ave, Bismarck 58504 | (701) 258-9386 |
| Painters Local Bismarck 58501 | (701) 222-4418 |
| North Dakota Public Employees 3333 E Broadway Ave # 1220, Bismarck 58501 | (701) 223-1964 |
| Missouri Slope Central Labor 1323 E Front Ave, Bismarck 58504 | (701) 224-9503 |
| Ibew System Council 1800 Commerce St, Bismarck 58501 | (701) 258-6370 |