| Business | Phone |
| Giles Engineering Assoc Inc 8300 Guilford Rd # F1, Columbia 21046 | (410) 312-9950 |
| Mecx 9189 Red Branch Rd, Columbia 21045 | (410) 772-3300 |
| Prospective Technology Inc 7413 Swan Point Way, Columbia 21045 | (410) 381-5375 |
| Scs Engineers 10630 Little Patuxent Pky #127, Columbia 21044 | (410) 995-4040 |
| Tidewater Inc 8950 State Route 108 # 100, Columbia 21045 | (410) 997-4458 |
| Weston Solutions Inc 5950 Symphony Woods Rd # 312, Columbia 21044 | (410) 910-6810 |