| Concorde Security Pte Ltd | East | School | SO | SO | Simei |
| Union Security Services Pte. Ltd. | East | Data Centre | SO | SO | Simei |
| Prosec Services Pte Ltd | East | Data Centre | SO | SO | Simei |
| William Secure Solutions Pte Ltd | East | Healthcare | SO | SO | Simei |
| Royal Security Management Services Pte Ltd | East | Gov Building | SO | SO | Simei |
| Group Security Service Pte Ltd | East | Condominium | SO | SO | Simei |
| Unique Security Services Pte Ltd | East | Condominium | SO | SO | Simei |
| Premier Security Co-operative Ltd | East | Commercial | SO | SO | Simei |
| Prospect Protection Pte Ltd | East | Industrial / Factory | SO | SO | Simei |
| Inhouse Employer | Island Wide | Construction | OM | SO | Yishun |
| Force-One Security | North | Data Centre | SO | SO | Hougang |
| Prospect Protection Pte Ltd | East | Industrial / Factory | SO | SO | Simei |
| Prosec Services Pte Ltd | East | Data Centre | SO | SO | Simei |
| Sands Global Pte Ltd | East | Condominium | SO | SO | Simei |
| Kingston Property Maintenance Services Pte Ltd | East | Condominium | SO | SO | Simei |
| William Secure Solutions Pte Ltd | East | Condominium | SO | SO | Simei |
| Sands Global Pte Ltd | East | Condominium | SO | SO | Simei |
| AETOS Holdings Pte Ltd | Island Wide | Mix-Development | APO | SO | Tampines |
| Storm Protection Pte Ltd | South | Commercial | SO | SO | Admiralty |
| PICO Guards Pte Ltd | North | Industrial / Factory | SO | SO | Bras Basah |
| Inhouse Employer | North | In-House | SO | SO | Bras Basah |
| Regal Security & Fire Management Services Pte Ltd | West | Dormitory | SO | SO | Bras Basah |
| G4S Secure Solutions (Singapore) Pte Ltd | North | School | SO | SO | Bras Basah |
| Force-One Security | Central | Industrial / Factory | SO | SO | Bras Basah |
| Peregrine Security Pte. Ltd. | Central | School | SO | SO | Bras Basah |
