| Business | Phone |
| Tighe & Bond 1000 Bridgeport Ave # 20, Shelton 6484 | (203) 712-1100 |
| Sigma Engineering Inc 5 October Ln, Shelton 6484 | (203) 929-6978 |
| Dark Field Technologies 1077 Bridgeport Ave # B, Shelton 6484 | (203) 925-8581 |
| Hamworthy-Peabody Combustion 70 Shelton Technology Ctr, Shelton 6484 | (203) 922-1199 |