| Business | Phone |
| Zlotnicki & Neuman Malvern 19355 | (610) 644-6116 |
| Consulting Eng & Scientists 41 General Warren Blvd, Malvern 19355 | (610) 296-2250 |
| Fuel & Combustion Technology 5 Great Valley Pkwy # 323, Malvern 19355 | (610) 725-8840 |
| Geiger Gunter Systems Ltd 4173 Howell Rd # C, Malvern 19355 | (610) 933-7911 |
| Mc Cormick Taylor Inc 40 General Warren Blvd # 260, Malvern 19355 | (610) 640-3500 |
| Kohli & Assoc Inc 42 Lloyd Ave, Malvern 19355 | (610) 644-5591 |