| Tighe & Bond Engineers | | Sunapee | NH | Engineer | Key Contacts | Active Projects | |
| Rist-Frost-Shumway Engineering, P.C. / RFS Engineering | | Laconia | NH | Engineer | Key Contacts | Active Projects |  .com/ |
| Granite State Plumbing & Heating | | Weare | NH | Engineer | Key Contacts | Active Projects |  .com/ |
| Wright Pierce Engineers | | Portsmouth | NH | Engineer | Key Contacts | Active Projects |  .com/ |
| Pathways Consulting, LLC | | Lebanon | NH | Engineer | Key Contacts | Active Projects | .com/ |
| Hydroterra Environmental Services | | Dover | NH | Engineer | Key Contacts | Active Projects | |
| Eastern Analytical Inc | | Concord | NH | Engineer | Key Contacts | Active Projects | |
| Hoyle Tanner & Associates Inc | | Manchester | NH | Engineer | Key Contacts | Active Projects | .com |
| Tetra Tech Rizzo | | Manchester | NH | Engineer | Key Contacts | Active Projects | |
| Horizons Engineering, Inc | | Littleton | NH | Engineer | Key Contacts | Active Projects |  .com/ |
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