| RAS Security Pte Ltd | North | Commercial | OE | SSO | Tuas Link |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SSO | Tuas Link |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SSO | Tuas Link |
| Certis Group | Island Wide | Commercial | SO | SSO | Pasir Ris |
| Certis Group | Island Wide | Commercial | SO | SSO | Pasir Ris |
| First Security & Private Investigation (Singapore) Pte Ltd | South | Commercial | SO | SO | Punggol |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SS | Punggol |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SSO | - |
| Elitez Security Pte Ltd | East | Commercial | SO | SSS | MacPherson |
| RAS Security Pte Ltd | North | Commercial | OE | SSS | Yishun |
| Bulls-Eye Security Services Pte Ltd | Central | Commercial | SS | SSS | Yishun |
| Union Security Services Pte. Ltd. | North | Commercial | SS | SSS | Yishun |
| Reachfield Security & Safety Management Pte Ltd | South | Commercial | SS | SS | Woodlands |
| SMS Investigation & Security Pte Ltd | Central | Commercial | SS | CSO | Clementi |
| Primesafe Security & Investigation Pte Ltd | South | Commercial | SS | SO | Bright Hill |
| SMS Investigation & Security Pte Ltd | Central | Commercial | SS | SS | Yishun |
| SMS Investigation & Security Pte Ltd | Central | Commercial | SS | SS | Yishun |
| SMS Investigation & Security Pte Ltd | Central | Commercial | SS | CSO | Clementi |
| Shine Security Agency Pte Ltd | Central | Commercial | SSO | SS | Punggol |
| Unique Security Services Pte Ltd | West | Commercial | SO | SO | Lakeside |
| Triple ‘S’ Protection Pte Ltd | West | Commercial | SSO | SO | Lakeside |
| Unique Security Services Pte Ltd | West | Commercial | SO | SO | Lakeside |
| Unique Security Services Pte Ltd | West | Commercial | SO | SO | Lakeside |
| SMS Investigation & Security Pte Ltd | Central | Commercial | SS | SS | Marsiling |
| RAS Security Pte Ltd | North | Commercial | OE | SS | Marsiling |
