| Strive Security Pte Ltd | Island Wide | - | OE | CSO | Pasir Ris |
| SATS Ltd | Island Wide | - | OM | SSS | Jurong East |
| SATS Ltd | Island Wide | - | OM | CSO | Choa Chu Kang |
| Sands Global Pte Ltd | East | Condominium | SO | SO | Simei |
| Force-One Security | Central | Commercial | SO | SS | Ang Mo Kio |
| RAS Security Pte Ltd | North | Commercial | SSO | SS | Punggol |
| William Secure Solutions Pte Ltd | East | Condominium | SSS | CSO | Woodlands |
| Orchid Hotel Private Limited | Central | In-House | OM | SSS | Sengkang |
| Inhouse Employer | Island Wide | Construction | OM | SS | Sengkang |
| Inhouse Employer | West | School | OE | CSO | Bukit Panjang |
| Union Security Services Pte. Ltd. | North | - | SSO | CSO | Bedok |
| Star Security Services | Island Wide | - | Security Mgt | Nil | Ang Mo Kio |
| Kingston Property Maintenance Services Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| Overseas (Singapore) Security & Private Investigation Consultants Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OM | SSO | Clementi |
| RAS Security Pte Ltd | North | Commercial | SSO | SSO | Hougang |
| Certis Group | Central | Commercial | SO | SO | Bukit Batok |
| Titanium Safety & Security Pte Ltd | North | In-House | OE | CSO | Marsiling |
| Regal Security & Fire Management Services Pte Ltd | Central | - | OE | CSO | Marsiling |
| Peregrine Security Pte. Ltd. | Island Wide | - | OE | CSO | Marsiling |
| Titanium Safety & Security Pte Ltd | Island Wide | - | OE | SSS | Tampines |
| RAS Security Pte Ltd | East | Commercial | SS | SSS | Sengkang |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SS | Bukit Batok |
| Inhouse Employer | West | Industrial / Factory | SO | SS | Jalan Besar |
| AETOS Holdings Pte Ltd | West | - | SO | SO | Pioneer |
