| Business | Phone |
| Aeronautical Radio Inc 530 Mccormick Dr, Glen Burnie 21061 | (410) 863-7293 |
| Corrosion Control Consultants 848 North Shore Dr, Glen Burnie 21060 | (410) 439-1740 |
| Invenco Advisory Svc 7310 Ritchie Hwy # 604, Glen Burnie 21061 | (410) 761-6363 |
| Javan & Walter Inc 7310 Ritchie Hwy # 804, Glen Burnie 21061 | (410) 590-1585 |
| Mc Neill & Baldwin 7310 Ritchie Hwy # 912, Glen Burnie 21061 | (410) 768-5500 |
| Michael Baker Jr Inc 801 Cromwell Park Dr # 110, Glen Burnie 21061 | (410) 424-2210 |
| Omnilink International Corp 7310 Ritchie Hwy, Glen Burnie 21061 | (410) 787-1140 |
| Street Traffic Studies Ltd 400 Crain Hwy N, Glen Burnie 21061 | (410) 590-5500 |
| Wtm Assoc 304 Fernglen Ave, Glen Burnie 21061 | (410) 761-7182 |