| G4S Secure Solutions (Singapore) Pte Ltd | Central | In-House | SSO | SO | Bukit Batok |
| G4S Secure Solutions (Singapore) Pte Ltd | South | - | SO | SO | Bukit Batok |
| Peregrine Security Pte. Ltd. | Central | - | SSO | SO | Bukit Batok |
| Force-One Security | Central | Commercial | SO | SO | Bukit Batok |
| Force-One Security | Central | Commercial | SO | SO | Bukit Batok |
| Union Security Services Pte. Ltd. | Island Wide | - | SSO | SO | Bukit Batok |
| G4S Secure Solutions (Singapore) Pte Ltd | South | - | SO | SO | Bukit Batok |
| Total Protection Solutions Pte Ltd | North | - | SSO | SO | Bukit Batok |
| Force-One Security | Central | Commercial | SO | SO | Bukit Batok |
| GWC Commercial Pte. Ltd. | Central | Commercial | SO | SO | Bukit Batok |
| Securus Pte Ltd | Island Wide | - | OE | SO | Bukit Batok |
| Inhouse Employer | North | In-House | SO | SO | Bukit Batok |
| Titanium Safety & Security Pte Ltd | North | In-House | SSO | SO | Bukit Batok |
| M Social Singapore | Central | Hotel | Sec Tech / Eng | SO | Bukit Batok |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SO | Bukit Batok |
| SECOM Singapore Pte Ltd | Island Wide | - | OE | SO | Bukit Batok |
| G4S Secure Solutions (Singapore) Pte Ltd | Central | In-House | SSO | SO | Bukit Batok |
| Triple ‘S’ Protection Pte Ltd | West | Commercial | SSO | SO | Bukit Batok |
| Premier Security Co-operative Ltd | West | Dormitory | SO | SO | Bukit Batok |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SO | Bukit Batok |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SO | Bukit Batok |
| Legion Protection Pte Ltd | Island Wide | - | OE | SO | Bukit Batok |
| Certis Group | Central | Commercial | SO | SO | Bukit Batok |
| Pedro Investigations & Security Services Pte. Ltd. | Central | - | SSO | SO | Bukit Batok |
| G4S Secure Solutions (Singapore) Pte Ltd | Central | In-House | SSO | SO | Bukit Batok |
