| Business | Phone |
| Don Selvy Enterprise Inc Bel Air 21014 | (410) 838-5073 |
| Dsspe Engineering 4401 Philadelphia Rd, Bel Air 21015 | (410) 734-6110 |
| Guild Associates Inc 900 S Main St # 105, Bel Air 21014 | (410) 420-9775 |
| L G Wolff Assoc 10 W Pennsylvania Ave, Bel Air 21014 | (410) 879-3966 |
| Mission Critical Enterprises 222 Temple Dr, Bel Air 21015 | (443) 512-0878 |
| Noble Consulting Engineering 30 S Main St, Bel Air 21014 | (410) 893-9542 |
| Omni Engineering Inc Bel Air 21015 | (410) 734-6000 |
| Opti Metrics Inc 2107 Laurel Bush Rd # 209, Bel Air 21015 | (410) 569-6081 |
| Ventana Corp 340 Althea Ct, Bel Air 21015 | (410) 515-4564 |