| G4S Secure Solutions (Singapore) Pte Ltd | East | In-House | SSO | SS | Bukit Panjang |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SS | Bukit Panjang |
| G4S Secure Solutions (Singapore) Pte Ltd | Central | In-House | SSO | SS | Bukit Panjang |
| Pedro Investigations & Security Services Pte. Ltd. | Central | - | SSO | SS | Bukit Panjang |
| SMS Investigation & Security Pte Ltd | Central | Condominium | SSO | SSS | Pasir Ris |
| Prosec Services Pte Ltd | East | Data Centre | SSO | SSS | Pasir Ris |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SSS | Pasir Ris |
| Union Security Services Pte. Ltd. | East | Condominium | SSO | SO | Tampines |
| Peregrine Security Pte. Ltd. | Central | - | SSO | CSO | Bedok |
| Inhouse Employer | North | Industrial / Factory | SSO | SS | Yishun |
| Securitas Guarding Services (Singapore) Pte Ltd | West | Commercial | SSO | CSO | Bedok |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SS | Simei |
| IGC Security Services Pte Ltd | Central | Condominium | SSO | SSO | Sengkang |
| Acestes Pte Ltd | East | Condominium | SSO | SSO | Sengkang |
| Soverus Pte Ltd | Central | Commercial | SSO | SS | Buona Vista |
| PICO Guards Pte Ltd | Central | School | SSO | SSO | Jurong East |
| Union Security Services Pte. Ltd. | North | - | SSO | SSS | Yishun |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SSS | Yishun |
| Premier Security Co-operative Ltd | South | Retail | SSO | SSS | Yishun |
| Premier Security Co-operative Ltd | South | Retail | SSO | SSS | Yishun |
| Prosec Services Pte Ltd | East | - | SSO | SSO | Tampines |
| Peregrine Security Pte. Ltd. | Central | - | SSO | CSO | Bedok |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SSO | Eunos |
| SMS Investigation & Security Pte Ltd | Central | Condominium | SSO | SS | Pioneer |
| Premier Security Co-operative Ltd | Island Wide | - | SSO | SO | Woodlands |
