| Dragnet Smartech Security Pte Ltd | West | Commercial | SSS | SSS | Choa Chu Kang |
| Force-One Security | Central | Commercial | SO | SO | Yishun |
| RAS Security Pte Ltd | North | Commercial | OE | SSS | Tiong Bahru |
| Certis Group | Central | Commercial | SO | SSO | Choa Chu Kang |
| PICO Guards Pte Ltd | Central | Commercial | SSS | CSO | Toa Payoh |
| RAS Security Pte Ltd | North | Commercial | OE | SS | Bukit Batok |
| Certis Group | Central | Commercial | SO | SS | Bukit Batok |
| SECOM Smart (Singapore) Pte. Ltd. | West | Commercial | SSO | SS | Bukit Batok |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SS | Bukit Batok |
| RAS Security Pte Ltd | North | Commercial | SSO | SO | Clementi |
| RAS Security Pte Ltd | North | Commercial | SSO | SO | Clementi |
| SECOM Smart (Singapore) Pte. Ltd. | West | Commercial | SSO | SSO | Choa Chu Kang |
| RAS Security Pte Ltd | North | Commercial | SSO | SSO | Commonwealth |
| Inhouse Employer | North | Commercial | SO | SSO | Choa Chu Kang |
| SMS Investigation & Security Pte Ltd | Central | Commercial | SO | SO | Serangoon |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SS | Bukit Batok |
| Security Masters Pte Ltd | North | Commercial | CSO | SO | Ang Mo Kio |
| RAS Security Pte Ltd | North | Commercial | OE | CSO | Ang Mo Kio |
| RAS Security Pte Ltd | North | Commercial | OE | SSS | Bedok |
| Certis Group | Central | Commercial | SO | SS | Bukit Batok |
| Eagle I Security Services Pte Ltd | East | Commercial | SO | SO | Pasir Ris |
| RAS Security Pte Ltd | North | Commercial | OE | SSS | Bukit Batok |
| RAS Security Pte Ltd | North | Commercial | OE | SS | Bukit Batok |
| RAS Security Pte Ltd | North | Commercial | OE | SSS | Bedok |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SS | Ang Mo Kio |
