| Company | Location | Certifications | License # |
|---|---|---|---|
| Albert A. Marrone | Summit Point, WV | Installer (Class I) | 54-96-0220 |
| Bernard Lee Snyder | Kearneysville, WV | Installer (Class I) | 54-18-028 |
| David B. Hathaway | Charles Town, WV | Installer (Class II) | 54-00-A-223 |
| David Kidwell Jr. | Harpers Ferry, WV | Installer (Class II) | 54-08-A-0051 |
| David William Lutman | Shenandoah Junction, WV | Installer (Class I) | 54-23-019 |
| Dwayne Pauley | Harpers Ferry, WV | Installer (Class II) | 54-24-A-0030 |
| Erick E. Speck | Shenandoah Junction, WV | Installer (Class II) | 54-01-A-0214 |
| Garry H. Shipley | Shepherdstown, WV | Installer (Class I) | 54-17-049 |
| James A. Marrone | Kearneysville, WV | Installer (Class I) | 54-01-0220 |
| James M. Thomas | Kearneysville, WV | Installer (Class II) | 54-24-A-0032 |
| Jeremy A. Martin | Shepherdstown, WV | Installer (Class I) | 54-20-013 |
| Jeriame Christopher Webster | Kearneysville, WV | Installer (Class II) | 54-22-A-044 |
| Jerry D. Franklin | Charles Town, WV | Installer (Class I) | 54-21-059 |
| John Copsey | Harpers Ferry, WV | Installer (Class II) | 54-19-A-011 |
| Jonathon P. Rayburn | Harpers Ferry, WV | Installer (Class II) | 54-97-A-0202 |
| Joshbeen Singh Grewal | Kearneysville, WV | Installer (Class II) | 54-20-A-034 |
| Justin M. Sanbower | Harpers Ferry, WV | Installer (Class I) | 54-19-034 |
| Kevin B. Grove | Harpers Ferry, WV | Installer (Class II) | 54-17-A-051 |
| Kevin Catrow | Kearneysville, WV | Installer (Class I) | 54-17-038 |
| Larry David Dunn | Shenandoah Junction, WV | Installer (Class II) | 54-76-A-1399 |
| Larry M. Everhart Iii | Kearneysville, WV | Installer (Class I) | 54-77-0150 |
| Lorrie Baker | Harpers Ferry, WV | Installer (Class II) | 54-16-A-031 |
| Lowell Keith Crim | Summit Point, WV | Installer (Class II) | 54-87-A-0264 |
| Mark H. Kable | Ranson, WV | Installer (Class I) | 54-01-0217 |
| Mark Stolipher | Rippon, WV | Installer (Class I) | 54-14-002 |
| Mark Wayne Rakes | Shenandoah Junction, WV | Installer (Class I) | 54-23-021 |
| Matthew M. Filling | Summit Point, WV | Installer (Class I) | 54-21-010 |
| Nathan Spinks | Harpers Ferry, WV | Installer (Class I) | 54-25-039 |
| Neal K. Snyder | Charles Town, WV | Installer (Class I) | 54-85-0065 |
| Norman R. Corbin Iii | Harpers Ferry, WV | Installer (Class II) | 54-98-A-0224 |
| Norman Russell Corbin Iv | Harpers Ferry, WV | Installer (Class II) | 54-17-A-006 |
| Paul D Propst Jr. | Kearneysville, WV | Installer (Class I) | 54-25-045 |
| Peter F. Kubic | Kearneysville, WV | Installer (Class I) | 54-90-0237 |
| Richard R. Pauley Jr. | Bunkerhill, WV | Installer (Class II) | 54-21-A-055 |
| Robert K. Lanham | Charles Town, WV | Installer (Class I) | 54-01-0238 |
| Ronald L. Smoot | Summit Point, WV | Installer (Class II) | 54-00-A-0219 |
| Steve Speck | Shenandoah Junction, WV | Installer (Class II) | 54-03-A-0074 |
| Vincent T. Secatello | Kearneysville, WV | Installer (Class II) | 54-04-A-0043 |
| Wayne Eugene Stone | Summit Point, WV | Installer (Class I) | 54-17-014 |
| William C. Snelson Jr. | Kearneysville, WV | Installer (Class I) | 54-95-0224 |
| William C. Walls | Kearneysville, WV | Installer (Class I) | 54-08-0002 |
| William D. Grove | Harpers Ferry, WV | Installer (Class I) | 54-16-032 |
| William H. Gaestel | Shepherdstown, WV | Installer (Class I) | 54-10-008 |
| William R. Hoak | Kearneysville, WV | Installer (Class I) | 54-76-0195 |
| William Richard Rogers | Harpers Ferry, WV | Installer (Class II) | 54-13-A-006 |
45 companies in the West Virginia OEHS certified onsite sewage system installers are based in Jefferson County as of 2026-07-23. Companies based elsewhere in West Virginia also commonly serve the county.
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