| Business | Phone |
| Kci Technologies Inc 153 E Chestnut Hill Rd # 102, Newark 19713 | (302) 731-9176 |
| Kercher Engineering Inc 254 Chapman Rd, Newark 19702 | (302) 894-1098 |
| Kercher Engineering Inc 35 E Periwinkle Ln, Newark 19711 | (302) 239-9515 |
| Larson Engineering 2717 Pulaski Hwy, Newark 19702 | (302) 731-7434 |
| Mc Bride & Ziegler Inc 2607 Eastburn Ctr, Newark 19711 | (302) 737-9138 |
| Stephens Environmental 229 Lake Dr, Newark 19702 | (302) 286-0406 |
| Remington & Vernick Engnrng 260 Chapman Rd # 104f, Newark 19702 | (302) 266-0212 |
| Walsh Engineering Inc 201 Possum Park Rd # 2, Newark 19711 | (302) 738-2900 |