| Business | Phone |
| Acm Technologies Inc 103a E Jarrettsville Rd, Forest Hill 21050 | (410) 420-8001 |
| Automaticket 110 Industry Ln, Forest Hill 21050 | (410) 838-0036 |
| Barry Andrews Land Co 19 Newport Dr, Forest Hill 21050 | (410) 420-0640 |
| Cemcorp 110 Industry Ln, Forest Hill 21050 | (410) 838-0036 |
| Harford & Cecil Physical Thrpy 2 Colgate Dr, Forest Hill 21050 | (410) 879-7769 |
| Jettlinx Net 4 E Jarrettsville Rd, Forest Hill 21050 | (410) 838-9552 |
| Kar Inc 4 Newport Dr, Forest Hill 21050 | (410) 420-8589 |
| Mike's Customs Inc 1654 Morse Rd, Forest Hill 21050 | (410) 692-2101 |
| Modular Components National 105 E Jarrettsville Rd, Forest Hill 21050 | (410) 420-1470 |
| Raace Foundation 134 Industry Ln, Forest Hill 21050 | (410) 893-1001 |