| Business | Phone |
| Cld Consulting Engineers 540 N Commercial St # 401, Manchester 3101 | (603) 668-8223 |
| Dubois Engineering Assoc 117 Harrison St, Manchester 3104 | (603) 666-0900 |
| Eclipse Fiber Net Corp 8025 S Willow St # 109, Manchester 3103 | (603) 647-5858 |
| Edwards & Kelcey Inc 1 Sundial Ave # 410, Manchester 3103 | (603) 666-7181 |
| G Systems Corp 189 Cranwell Dr, Manchester 3109 | (603) 647-6693 |
| Gds Assoc Inc 1181 Elm St # 205, Manchester 3101 | (603) 656-0336 |
| Golder Associates Inc 540 N Commercial St # 250, Manchester 3101 | (603) 668-0880 |
| Tvga Engineering 380 Harvey Rd, Manchester 3103 | (603) 641-1350 |
| Vga Nozzle Co 250 N Bay St, Manchester 3104 | (603) 669-1515 |
| Hoyle Tanner & Assoc Inc 150 Dow St # 402, Manchester 3101 | (603) 669-5555 |
| Span Systems 90 Pine St, Manchester 3103 | (603) 772-7980 |
| John Jacobson & Assoc 41 Balch Ave, Manchester 3102 | (603) 668-3200 |
| John Turner Consulting 21 W Auburn St, Manchester 3101 | (603) 634-4388 |
| Kjd Svc 87 Young St, Manchester 3103 | (603) 622-6966 |
| Rizzo Associates Inc 889 Elm St # 405, Manchester 3101 | (603) 641-5006 |
| Lomasney Martin Engineer Inc 1001 Elm St, Manchester 3101 | (603) 627-2704 |
| Mentis Sciences Inc 150 Dow St, Manchester 3101 | (603) 624-9197 |
| Miller Engineering & Testing 100 Sheffield Rd, Manchester 3103 | (603) 668-6016 |