| Business | Phone |
| Pinkerton Security & Invstgtns 351 Civic Ave, Salisbury 21804 | (410) 341-0716 |
| Bennett Security Svc 1325 Mount Hermon Rd # 12a, Salisbury 21804 | (410) 742-0334 |
| Twin Security Llc 1229 Mount Hermon Rd, Salisbury 21804 | (410) 677-4675 |
| Wilkins Security & Patrol Inc 1505 Emerson Ave # 1, Salisbury 21801 | (410) 546-3181 |