| Kingston Property Maintenance Services Pte Ltd | Central | Mix-Development | SS | SS | Marsiling |
| Uniforce Security Services Pte Ltd | Central | Condominium | SS | SS | Marsiling |
| Certis Group | Island Wide | Commercial | SS | SS | Marsiling |
| Aigle Security Pte Ltd | North | Condominium | SS | SS | Marsiling |
| SMS Investigation & Security Pte Ltd | Central | Condominium | SS | SS | Marsiling |
| IGC Security Services Pte Ltd | South | Commercial | SS | SS | Marsiling |
| Bulls-Eye Security Services Pte Ltd | North | Condominium | SS | SS | Marsiling |
| Soverus Pte Ltd | South | Commercial | SS | SS | Marsiling |
| SMS Investigation & Security Pte Ltd | South | Condominium | SS | SS | Marsiling |
| Certis Group | West | Depot | SS | SS | Marsiling |
| SMS Investigation & Security Pte Ltd | Central | Condominium | SS | SS | Marsiling |
| Union Security Services Pte. Ltd. | North | Commercial | SS | SS | Marsiling |
| Bulls-Eye Security Services Pte Ltd | North | Condominium | SS | SS | Marsiling |
| SATS Ltd | Island Wide | - | OM | CSO | Marsiling |
| G4S Secure Solutions (Singapore) Pte Ltd | North | School | SSO | SSO | Marsiling |
| Guthrie FMC Security Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| Peregrine Security Pte. Ltd. | Island Wide | - | OE | CSO | Marsiling |
| Soverus Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| SATS Ltd | East | - | OE | CSO | Marsiling |
| Guthrie FMC Security Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| Overseas (Singapore) Security & Private Investigation Consultants Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| Regal Security & Fire Management Services Pte Ltd | Central | - | OE | CSO | Marsiling |
| SATS Ltd | Island Wide | - | OM | CSO | Marsiling |
| Inhouse Employer | West | In-House | OM | CSO | Marsiling |
| Fervour Pte Ltd | Island Wide | - | OM | CSO | Marsiling |
