| Business | Phone |
| Advanced Engineering & Envrnmn 1815 Schafer St # 301, Bismarck 58501 | (701) 221-0530 |
| Albright Engineering Inc 2900 E Broadway Ave, Bismarck 58501 | (701) 258-7262 |
| Wold Engineering 316 Eastdale Dr, Bismarck 58501 | (701) 258-9227 |
| Ulteig Engineers 1412 Basin Ave, Bismarck 58504 | (701) 258-6507 |
| Swenson Hagen & Co 909 Basin Ave, Bismarck 58504 | (701) 223-2600 |
| Houston Engineering Inc 304 E Rosser Ave # 220, Bismarck 58501 | (701) 323-0200 |