| Business | Phone |
| Brightview Electrical Co Inc 1205 Delmont Rd, Severn 21144 | (410) 551-1457 |
| Electracon Inc 8186 Telegraph Rd, Severn 21144 | (410) 519-0626 |
| Severn Electric Inc 8340 New Cut Rd, Severn 21144 | (410) 987-4390 |
| Tesco 8176 Telegraph Rd, Severn 21144 | (410) 551-9300 |
| Williams Energy Systems Inc Severn 21144 | (410) 969-4533 |