| Orchid Hotel Private Limited | Central | In-House | OM | SSO | Boon Lay |
| Force-One Security | North | Data Centre | OE | SO | Tampines |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SS | Yishun |
| Orchid Hotel Private Limited | Central | In-House | OM | SS | Hougang |
| Focus Security Services Pte Ltd | West | Condominium | SS | SS | - |
| First Security & Private Investigation (Singapore) Pte Ltd | West | Condominium | SSO | SSO | Choa Chu Kang |
| Certis Group | Central | Commercial | SO | SS | Bukit Batok |
| Union Security Services Pte. Ltd. | Island Wide | - | OE | CSO | Marsiling |
| Peregrine Security Pte. Ltd. | Island Wide | - | OE | SS | Clementi |
| GATES PCM Integrated Services Pte Ltd | Island Wide | - | OE | SS | Pasir Ris |
| Inhouse Employer | North | In-House | SO | SS | Tuas Link |
| Dragnet Smartech Security Pte Ltd | Central | School | SSO | SSO | Pasir Ris |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SSO | Redhill |
| Securus Pte Ltd | Island Wide | - | OE | SS | Choa Chu Kang |
| Securus Pte Ltd | Island Wide | - | OM | CSO | Marsiling |
| PICO Guards Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| Pan Pacific Singapore | South | In-House | Security Mgt | SS | - |
| Reachfield Security & Safety Management Pte Ltd | South | Commercial | SS | SSS | Yishun |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OE | SSS | Bedok |
| G4S Secure Solutions (Singapore) Pte Ltd | Island Wide | - | OE | CSO | Pasir Ris |
| AGS Integration Pte. Ltd. | Island Wide | - | OE | SS | Bukit Panjang |
| FormTeam Consultancy Pte Ltd | Central | Condominium | SO | SSO | Woodlands |
| Orchid Hotel Private Limited | Central | In-House | SSO | SSO | Bukit Gombak |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SSO | Simei |
