| ProtectPlus Pte Ltd | Island Wide | - | OE | SS | Hougang |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SS | Hougang |
| SATS Ltd | East | - | OE | SS | Hougang |
| TwinRock Global | Central | - | Security Mgt | SS | Hougang |
| Star Security Services | Island Wide | - | Security Mgt | SS | Hougang |
| Star Security Services | Island Wide | - | OE | SS | Woodlands |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Stalwart Security Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Securus Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OM | CSO | Choa Chu Kang |
| GoMobile Security Solutions Pte Ltd | Island Wide | - | OM | CSO | Choa Chu Kang |
| Peregrine Security Pte. Ltd. | Island Wide | - | OE | SS | Woodlands |
| TwinRock Global | Central | - | SO | SSO | Bukit Batok |
| Peregrine Security Pte. Ltd. | Central | - | SSO | SSO | Bukit Batok |
| Union Security Services Pte. Ltd. | North | - | SSO | SSO | Bukit Batok |
| Brink's Singapore Pte Ltd | East | - | SO | SSO | Bukit Batok |
| G4S Secure Solutions (Singapore) Pte Ltd | South | - | SO | SSO | Bukit Batok |
| Pedro Investigations & Security Services Pte. Ltd. | Central | - | SSO | SSO | Bukit Batok |
| TwinRock Global | Central | - | SO | SSO | Bukit Batok |
| Guthrie FMC Security Pte Ltd | Island Wide | - | OE | SSO | Bukit Batok |
| Titanium Safety & Security Pte Ltd | Island Wide | - | OE | SSO | Bukit Batok |
| ProtectPlus Pte Ltd | Island Wide | - | OE | SO | Yishun |
| ProtectPlus Pte Ltd | Island Wide | - | OE | SO | Yishun |
| Pedro Investigations & Security Services Pte. Ltd. | Central | - | SSO | SSO | Bukit Batok |
| ProtectPlus Pte Ltd | Island Wide | - | OE | SO | Yishun |
