| 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 |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | CSO | Marsiling |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SSO | Boon Lay |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SS | Bukit Batok |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SS | Bukit Batok |
| Force-One Security | Central | Commercial | SO | SS | Toa Payoh |
| Force-One Security | Central | Commercial | SO | SS | Toa Payoh |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SS | Bukit Batok |
| RAS Security Pte Ltd | North | Commercial | OE | SS | Choa Chu Kang |
| Concorde Security Pte Ltd | East | Commercial | SO | SO | Punggol |
| RAS Security Pte Ltd | North | Commercial | SSO | SS | Yishun |
| Security & Risk Solutions Pte. Ltd. | Central | Commercial | SO | SO | Potong Pasir |
| RAS Security Pte Ltd | North | Commercial | SSO | SSO | Bukit Batok |
| Aigle Security Pte Ltd | East | Commercial | SO | SO | Pasir Ris |
| RAS Security Pte Ltd | North | Commercial | OE | SSS | Bedok |
| GATES PCM Integrated Services Pte Ltd | East | Commercial | SS | SS | Tampines |
