| Business | Phone |
| Schlenger Pitz & Assoc Inc 15 W Aylesbury Rd, Timonium 21093 | (410) 561-1337 |
| Constellation Design Group Inc 57 W Timonium Rd # 200, Timonium 21093 | (410) 252-1884 |
| Cotswold Engineering Co 11001 Falls Rd, Timonium 21093 | (410) 828-8494 |
| Engineering Techniques & Sltns 10 Gerard Ave # 109, Timonium 21093 | (410) 453-0594 |
| Stagge Panel Systems Inc 8 Gray Squirrel Ct, Timonium 21093 | (410) 561-9870 |
| Techinfocus 2201 Stryker Ct # 100, Timonium 21093 | (410) 561-8338 |