| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SSO | Jurong East |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | Commercial | SS | SS | Yishun |
| Triple ‘S’ Protection Pte Ltd | West | Commercial | SS | SS | Yishun |
| GWC Commercial Pte. Ltd. | Central | Commercial | SO | SSO | - |
| Malaysia Dairy Industries Pte Ltd | East | Commercial | OE | SSO | Hougang |
| Certis Group | Central | Commercial | SO | SSO | Bukit Batok |
| Resorts World Sentosa | South | Commercial | SO | SSO | Bukit Batok |
| RAS Security Pte Ltd | North | Commercial | SSO | SSO | Bukit Batok |
| Securus Pte Ltd | Island Wide | Commercial | SO | SO | Tampines |
| A-SAT Pte Ltd | North | Commercial | SSO | SSO | Bukit Batok |
| SECOM Smart (Singapore) Pte. Ltd. | West | Commercial | SSO | SSO | Bukit Batok |
| Certis Group | Central | Commercial | SO | SSO | Bukit Batok |
| E2E Global Services Pte Ltd | East | Commercial | SO | SSO | Jurong East |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SO | SSO | Jurong East |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SSO | Jurong East |
| Malaysia Dairy Industries Pte Ltd | East | Commercial | OE | SSO | Sengkang |
| First Security & Private Investigation (Singapore) Pte Ltd | South | Commercial | SO | SO | Potong Pasir |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | Commercial | SS | SS | Yishun |
| Soverus Pte Ltd | South | Commercial | SS | SS | - |
| Bulls-Eye Security Services Pte Ltd | Central | Commercial | SS | SS | Woodlands |
| Securus Pte Ltd | Island Wide | Commercial | SO | SO | Tampines |
| Certis Group | Central | Commercial | SO | SSO | Bukit Batok |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SSO | Bukit Batok |
| RAS Security Pte Ltd | North | Commercial | SSO | SSO | Bukit Batok |
| Inhouse Employer | North | Commercial | SO | SSO | Bukit Batok |
