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| Company | Location | County | Certifications | License # |
|---|---|---|---|---|
| Naastad Bros Inc | Hatton, ND | — | Installer | — |
| Naastad Brothers, Inc. | Hatton, ND | — | Installer | — |
| NCZ Express | New RockfordND, ND | — | Installer | — |
| ND Dirtworks Inc. | Bismarck, ND | — | Installer | — |
| Neset Consulting Service, Inc | Tioga, ND | — | Installer | — |
| Next Level Excavating LLC | Kenmare, ND | — | Installer | — |
| Next Level Fencing and Excavation | Williston, ND | — | Installer | — |
| Nodak Plumbing & Heating, Inc. | Mandan, ND | — | Installer | — |
| North Country Excavating & Construction, Inc. | Stanley, ND | — | Installer | — |
| North Prairie Contracting LLC | Perth, ND | — | Installer | — |
| North Valley Contracting | Park River, ND | — | Installer | — |
| Northern Improvement | Fargo, ND | — | Installer | — |
| Northern Plains Drilling & Excavating, Inc | Bismarck, ND | — | Installer | — |
| Northwest Septic & Oilfield Services | Crosby, ND | Divide | Pumper (Class I) | NDSP007390 |
| Nottestad Excavating LLC | Mandan, ND | — | Installer | — |
| Nova Oilfield Services, Inc. | Williston, ND | Williams | Pumper (Class I) | NDSP007292 |
| Novak Backhoe | Lankin, ND | Walsh | Pumper (Class I) | NDSP007291 |
| Novak Backhoe LLP | Lankin, ND | — | Installer | — |
| Novak's Landscaping & Snow | Minot, ND | — | Installer | — |
| Nygard Construction | Garrison, ND | — | Installer | — |
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