| Metropolis Security Systems Pte Ltd | Central | Industrial / Factory | SO | SSO | Yishun |
| G4S Secure Solutions (Singapore) Pte Ltd | Central | In-House | SSO | SSO | Marsiling |
| ARSLAN SRS Singapore | South | In-House | RSOC/CAMS Op | SSO | Simei |
| Star Security Services | Island Wide | - | Security Mgt | SSO | Hougang |
| Crowne Plaza Changi Airport | East | Hotel | Security Mgt | SSO | Hougang |
| Malaysia Dairy Industries Pte Ltd | East | Commercial | OE | SSO | Hougang |
| Dragnet Smartech Security Pte Ltd | East | Commercial | SSO | SSO | Potong Pasir |
| AETOS Holdings Pte Ltd | West | - | SO | SSO | Tuas Link |
| Regal Security & Fire Management Services Pte Ltd | Central | In-House | SSO | SSO | Tuas Link |
| Mainguard Security Services (S) Pte Ltd | South | Construction | SO | SSO | Tuas Link |
| SMS Investigation & Security Pte Ltd | Central | Condominium | SSO | SSO | - |
| Dragnet Smartech Security Pte Ltd | Central | Commercial | SSO | SSO | - |
| Excellent Security & Safety Pte Ltd | West | Condominium | SSO | SSO | - |
| Excellent Security & Safety Pte Ltd | West | Condominium | SSO | SSO | - |
| Crowne Plaza Changi Airport | East | Hotel | Security Mgt | SSO | Hougang |
| Triple ‘S’ Protection Pte Ltd | East | - | SSO | SSO | Tampines |
| Fervour Pte Ltd | Central | Data Centre | SO | SSO | - |
| Reachfield Security & Safety Management Pte Ltd | Central | Commercial | SSO | SSO | - |
| Soverus Pte Ltd | Central | Data Centre | SSO | SSO | - |
| Union Security Services Pte. Ltd. | Island Wide | Commercial | SO | SSO | - |
| PICO Guards Pte Ltd | East | Commercial | SO | SSO | - |
| Inhouse Employer | East | In-House | SO | SSO | Simei |
| Union Security Services Pte. Ltd. | East | Data Centre | SS | SSO | Simei |
| Reachfield Security & Safety Management Pte Ltd | Central | School | Security Mgt | SSO | Simei |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SSO | Simei |
