| Ranger Investigation & Security Services Pte Ltd | West | Construction | SO | SSS | Bukit Batok |
| Regal Security & Fire Management Services Pte Ltd | Central | - | OE | SSS | Bukit Batok |
| PICO Guards Pte Ltd | Central | Commercial | SSS | SSS | Bukit Batok |
| PICO Guards Pte Ltd | South | Commercial | SSS | SSS | Bukit Batok |
| PICO Guards Pte Ltd | South | - | SSS | SSS | Bukit Batok |
| Inhouse Employer | Island Wide | Construction | OM | CSO | Bukit Batok |
| Inhouse Employer | Island Wide | Construction | OM | CSO | Bukit Batok |
| Titanium Safety & Security Pte Ltd | North | In-House | SSO | SO | Bukit Batok |
| Certis Group | Central | Commercial | SO | SO | Bukit Batok |
| G4S Secure Solutions (Singapore) Pte Ltd | South | - | SO | SO | Bukit Batok |
| Pedro Investigations & Security Services Pte. Ltd. | Central | - | SSO | SO | Bukit Batok |
| Ranger Investigation & Security Services Pte Ltd | East | In-House | SSO | SO | Bukit Batok |
| Union Security Services Pte. Ltd. | Island Wide | - | SSO | SO | Bukit Batok |
| Pedro Investigations & Security Services Pte. Ltd. | Central | - | SSO | SO | Bukit Batok |
| SECOM Smart (Singapore) Pte. Ltd. | West | Commercial | SSO | SO | Bukit Batok |
| Certis Group | Central | Commercial | SO | SO | Bukit Batok |
| Ranger Investigation & Security Services Pte Ltd | West | Construction | SO | SO | Bukit Batok |
| SECOM Smart (Singapore) Pte. Ltd. | West | Commercial | SSO | SO | Bukit Batok |
| Metropolis Security Systems Pte Ltd | Island Wide | - | OE | SO | Bukit Batok |
| JEN Singapore Tanglin by Shangri-La | Central | In-House | OE | SO | Bukit Batok |
| G4S Secure Solutions (Singapore) Pte Ltd | South | - | SO | SO | Bukit Batok |
| G4S Secure Solutions (Singapore) Pte Ltd | South | - | SO | SO | Bukit Batok |
| Union Security Services Pte. Ltd. | Island Wide | - | SSO | SO | Bukit Batok |
| Prosec Services Pte Ltd | Central | Commercial | SO | SO | Bukit Batok |
| Total Protection Solutions Pte Ltd | North | - | SSO | SO | Bukit Batok |
