| Certis Group | Island Wide | - | SSO | SSO | Marsiling |
| Prosegur Singapore Pte Ltd | East | Industrial / Factory | SO | SO | Kaki Bukit |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | - | Security Mgt | Nil | Yishun |
| Regal Security & Fire Management Services Pte Ltd | Central | - | OE | CSO | Yishun |
| Acestes Pte Ltd | Island Wide | - | Security Mgt | SSO | Hougang |
| PICO Guards Pte Ltd | Island Wide | - | OE | SSO | Jurong East |
| G4S Secure Solutions (Singapore) Pte Ltd | South | - | SO | SO | Bukit Batok |
| Pedro Investigations & Security Services Pte. Ltd. | Central | - | SSO | CSO | Bedok |
| Dragnet Smartech Security Pte Ltd | Island Wide | Commercial | SO | SSO | Tampines |
| PICO Guards Pte Ltd | Island Wide | - | OM | SS | Woodlands |
| Overseas (Singapore) Security & Private Investigation Consultants Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| AGS Integration Pte. Ltd. | West | In-House | SS | SS | HarbourFront |
| Pedro Investigations & Security Services Pte. Ltd. | Central | - | SSO | CSO | Bedok |
| AGS Integration Pte. Ltd. | West | In-House | SS | SSS | Bukit Batok |
| Certis Group | Island Wide | - | SSO | SS | Choa Chu Kang |
| Labourtel Management Corporation Pte Ltd | West | Dormitory | SO | SSO | Woodlands |
| Inhouse Employer | Central | Mix-Development | Security Mgt | SSS | Redhill |
| PICO Guards Pte Ltd | Central | Commercial | SSS | CSO | Toa Payoh |
| Regal Security & Fire Management Services Pte Ltd | Central | - | OE | SS | Admiralty |
| Union Security Services Pte. Ltd. | Island Wide | - | OE | SS | Woodlands |
| PICO Guards Pte Ltd | Island Wide | - | OE | SS | Choa Chu Kang |
| Acestes Pte Ltd | Central | - | Security Mgt | Nil | Ang Mo Kio |
| Inhouse Employer | Central | Hotel | SO | SS | Marsiling |
| Excellent Security & Safety Pte Ltd | Central | Industrial / Factory | SSO | SSO | Toa Payoh |
| Acestes Pte Ltd | Island Wide | - | OM | SSS | Queenstown |
