GroundRosterThomas DuffieldLicensed
| Name | Thomas Duffield |
| License number | 00735 |
| License type | Professional Engineer, Septic System Designer |
| License status | Active — NH DES Designer/Installer roster |
| Location | Campton, New Hampshire 03223 |
Request a quote from Thomas Duffield
What this license covers
- Design: licensed to size and lay out a septic system for a specific site and soil condition.
How to verify this license
We publish this listing exactly as it appears in New Hampshire's official licensing records; we do not vouch for the business itself. Before hiring, look up license #00735 directly with the state, confirm it is still active, and ask for a current certificate of insurance.
Source: NH DES - Septic System Designers & Installers, last checked 2026-08-16. Verify at the official source.
Are you Thomas Duffield? Claim this listing to set your business name and add your website, service area, hours, and photos. It's free.