| Prosec Services Pte Ltd | East | - | SSO | SSO | Tampines |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SSO | Woodlands |
| Inhouse Employer | Central | Country Club | OM | SSO | Hougang |
| Securitas Guarding Services (Singapore) Pte Ltd | North | Data Centre | SSO | SSO | Woodlands |
| SMS Investigation & Security Pte Ltd | East | Condominium | SSO | SSO | Pasir Ris |
| Reachfield Security & Safety Management Pte Ltd | South | - | OE | SSO | Pasir Ris |
| SMS Investigation & Security Pte Ltd | North | Condominium | SSO | SSO | Yishun |
| Dragnet Smartech Security Pte Ltd | Central | School | SSO | SSO | Yishun |
| PICO Guards Pte Ltd | North | Industrial / Factory | SSO | SSO | Yishun |
| A-SAT Pte Ltd | North | Commercial | SSO | SSO | Yishun |
| First Security & Private Investigation (Singapore) Pte Ltd | West | Condominium | SSO | SSO | Bukit Batok |
| Triple ‘S’ Protection Pte Ltd | West | Commercial | SSO | SSO | Bukit Batok |
| GWC Commercial Pte. Ltd. | Central | Commercial | SO | SSO | - |
| GWC Commercial Pte. Ltd. | Central | Commercial | SO | SSO | - |
| Inhouse Employer | Central | In-House | SO | SSO | - |
| Inhouse Employer | North | In-House | SO | SSO | - |
| Orchid Hotel Private Limited | Central | In-House | SSO | SSO | - |
| Prospect Protection Pte Ltd | West | Industrial / Factory | SSO | SSO | - |
| Inhouse Employer | Central | In-House | SO | SSO | - |
| Grand Copthorne Waterfront Hotel | Central | In-House | SSO | SSO | - |
| Union Security Services Pte. Ltd. | East | Data Centre | SS | SSO | Jurong East |
| G4S Secure Solutions (Singapore) Pte Ltd | West | Commercial | SS | SSO | Jurong East |
| Reachfield Security & Safety Management Pte Ltd | West | Commercial | SS | SSO | Jurong East |
| FormTeam Consultancy Pte Ltd | Island Wide | - | OE | SSO | Jurong East |
| Soverus Pte Ltd | South | In-House | SSO | SSO | Jurong East |
