| Regal Security & Fire Management Services Pte Ltd | Central | In-House | SSO | CSO | Bedok |
| Premier Security Co-operative Ltd | Island Wide | - | SSO | SSO | Bedok North |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SSO | Pasir Ris |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SSO | Bukit Batok |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SS | MacPherson |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SSO | Bedok North |
| Pedro Investigations & Security Services Pte. Ltd. | Central | - | SSO | CSO | Bedok |
| PICO Guards Pte Ltd | North | Industrial / Factory | SSO | SS | Woodlands |
| Peregrine Security Pte. Ltd. | North | Industrial / Factory | SSO | SS | Woodlands |
| A-SAT Pte Ltd | North | Mix-Development | SSO | SS | Woodlands |
| A-SAT Pte Ltd | North | Commercial | SSO | SS | Woodlands |
| William Secure Solutions Pte Ltd | Central | Condominium | SSO | SS | Farrer Park |
| Premier Security Co-operative Ltd | Central | Commercial | SSO | SS | Farrer Park |
| Inhouse Employer | South | In-House | SSO | SO | Bedok |
| Excellent Security & Safety Pte Ltd | Central | Industrial / Factory | SSO | SSO | Toa Payoh |
| SMS Security | East | Condominium | SSO | SSO | Woodlands |
| PICO Guards Pte Ltd | Central | Commercial | SSO | SS | Tiong Bahru |
| IGC Security Services Pte Ltd | South | Industrial / Factory | SSO | SS | Tiong Bahru |
| Inhouse Employer | South | In-House | SSO | SO | Bedok |
| Excellent Security & Safety Pte Ltd | East | Commercial | SSO | SS | Aljunied |
| Certis Group | Island Wide | - | SSO | SSO | Choa Chu Kang |
| Dorsett Singapore | Central | Hotel | SSO | SO | Bedok |
| Inhouse Employer | South | In-House | SSO | SO | Bedok |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | Mix-Development | SSO | SSO | Bedok North |
| Ademco Security Pte Ltd | Island Wide | - | SSO | SSO | Bedok North |
