| Business | Phone |
| Civil Consultants 33 Spruce Ln, Dover 3820 | (603) 749-2550 |
| Design & Consulting Engineers 154 Middle Rd, Dover 3820 | (603) 742-7200 |
| Perot Systems Government Svc 100 Main St # 1, Dover 3820 | (603) 742-4211 |
| Noblin & Assoc Llc 680 Central Ave # 380, Dover 3820 | (603) 740-9400 |