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| Company | Location | County | Certifications | License # |
|---|---|---|---|---|
| J & D Clark, LLC | Moorhead, MN | — | Installer | — |
| J & J Rental, LLC | New Town, ND | Mountrail | Pumper (Class I) | NDSP005689 |
| J & J Striping | Carrington, ND | — | Installer | — |
| J & P Excavation LLC | Des Lacs, ND | — | Installer | — |
| J & R Dirtworks LLC | Carrington, ND | — | Installer | — |
| J & S Sanitation LLC | Beulah, ND | Mercer | Pumper (Class I) | NDSP007326 |
| J & S Underground | Burlington, ND | — | Installer | — |
| J&D Clark LLC | Moorehead, MN | — | Pumper (Class II) | NDSP007354 |
| J&J Excavating & Trucking Inc | Hamilton, MT | — | Installer | — |
| J&L Ditching | Beach, ND | — | Installer | — |
| Jacobson Plumbing, Heating, and ExcCaavl | Rutland, ND | — | Installer | — |
| James R. Joyce | Arnegard, ND | — | Installer | — |
| JB Excavating | Jamestown, ND | — | Installer | — |
| JCR Excavating, LLC | Watford City, ND | — | Installer | — |
| Jeff Port Construction, LLC | Clarkston, WA | — | Installer | — |
| JerichoExcavationand Hauling LLC | Parshall, ND | — | Installer | — |
| Jerry's Excavating | Casselton, ND | — | Installer | — |
| Jerry's Septic Service | New Town, ND | Mountrail | Pumper (Class I) | NDSP007392 |
| Jespersen Excavating Inc | Minot, ND | — | Installer | — |
| Jiffy Jons Inc. | Pelican Rapids, MN | — | Pumper (Class I) | NDSP007228 |
| Jim's Bobcat Service | Tioga, ND | — | Installer | — |
| JJP Companies, Inc. | Avon, CO | — | Installer | — |
| JK Construction | Dickinson, ND | — | Installer | — |
| JMAC Resources | Williston, ND | — | Installer | — |
| Joe's Digging Service, Inc. | Williston, ND | — | Installer | — |
| Joe's Pumping Service | Bantry, ND | McHenry | Pumper (Class I) | NDSP007293 |
| John Truchan | Killdeer, ND | — | Installer | — |
| Johnson & Schock Excavating LLC | Fargo, ND | — | Installer | — |
| Johnson Hoe Service | Bottineau, ND | — | Installer | — |
| Johnson Septic Service | Roseglen, ND | McLean | Pumper (Class II) | NDSP007359 |
| JTH Portables LLC | Tioga, ND | Williams | Pumper (Class I) | NDSP007281 |
| JTI Inc | Williston, ND | — | Installer | — |
| Juma's Septic Service | Ross, ND | Mountrail | Pumper (Class II) | NDSP007348 |
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