| Business | Phone |
| L Secure Inc 90 Madison St, Worcester 1608 | (508) 792-6700 |
| J & J Security & Patrol 21 Baxter St, Worcester 1602 | (508) 791-8867 |
| Allegiance Security Corp 274 Plantation St, Worcester 1604 | (508) 757-2577 |
| Us Security Assoc Inc 49 Wellington St, Worcester 1610 | (508) 797-3758 |
| Metro Crime Prevention 70 James St # 105, Worcester 1603 | (508) 795-7007 |
| Thompson Security & Patrol 340 Lake Ave N, Worcester 1605 | (508) 852-4446 |
| Marker Security Inc Worcester 1609 | (508) 421-4849 |
| Central Security 340 Main St, Worcester 1608 | (508) 752-0000 |
| Lusignan Security Agency 100 Front St, Worcester 1608 | (508) 792-6700 |