| RAS Security Pte Ltd | North | Commercial | SSO | SS | Choa Chu Kang |
| Premier Security Co-operative Ltd | South | Commercial | SS | SSS | Tanjong Pagar |
| Metropolis Security Systems Pte Ltd | South | Commercial | SSS | SSS | Woodlands |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SO | SSO | Woodlands |
| GWC Commercial Pte. Ltd. | Central | Commercial | SO | SSO | Woodlands |
| Premier Security Co-operative Ltd | North | Commercial | SSO | SS | Yishun |
| Metropolis Security Systems Pte Ltd | South | Commercial | SSS | SSS | Lakeside |
| Prosec Services Pte Ltd | Central | Commercial | SSS | SSS | Lakeside |
| PICO Guards Pte Ltd | Central | Commercial | SSS | SSS | Lakeside |
| PICO Guards Pte Ltd | South | Commercial | SSS | SSS | Lakeside |
| PICO Guards Pte Ltd | Central | Commercial | SSS | SSS | Lakeside |
| RAS Security Pte Ltd | North | Commercial | SSO | SS | Woodlands South |
| RAS Security Pte Ltd | North | Commercial | OE | SS | Woodlands South |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SSO | Woodlands |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SSO | Woodlands |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SSO | Woodlands |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SS | SS | Yishun |
| SMS Investigation & Security Pte Ltd | South | Commercial | SS | SS | Yishun |
| Union Security Services Pte. Ltd. | North | Commercial | SS | SS | Yishun |
| RAS Security Pte Ltd | East | Commercial | SS | SS | Yishun |
| William Secure Solutions Pte Ltd | South | Commercial | SS | SS | Yishun |
| Soverus Pte Ltd | South | Commercial | SS | SS | Woodlands South |
| RAS Security Pte Ltd | North | Commercial | OE | SS | Woodlands South |
| Dragnet Smartech Security Pte Ltd | West | Commercial | SSS | SSS | Jurong East |
| Reachfield Security & Safety Management Pte Ltd | South | Commercial | CSO | SSS | Jurong East |
