| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SSO | Simei |
| Metropolis Security Systems Pte Ltd | East | Condominium | SS | SS | Simei |
| Peregrine Security Pte. Ltd. | Island Wide | - | OE | SSO | Simei |
| RAS Security Pte Ltd | North | Commercial | SSO | SSO | Simei |
| Union Security Services Pte. Ltd. | East | Data Centre | SS | SSO | Simei |
| SATS Ltd | East | - | OE | SSO | Simei |
| Crowne Plaza Changi Airport | East | In-House | OE | SSO | Simei |
| SMS Security | East | Commercial | SSO | SS | Simei |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SSO | Simei |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | Industrial / Factory | SSS | SSO | Simei |
| AGS Integration Pte. Ltd. | Island Wide | - | SS | SSO | Simei |
| Premier Security Co-operative Ltd | Central | - | SS | SSO | Simei |
| SMS Investigation & Security Pte Ltd | Central | Condominium | SO | SSO | Simei |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SSO | Simei |
| Premier Security Co-operative Ltd | East | Commercial | SO | Nil | Simei |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SSO | Simei |
| AGS Integration Pte. Ltd. | Island Wide | - | SS | SSO | Simei |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SSO | Simei |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | - | Security Mgt | SSO | Simei |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SSO | Simei |
| Malaysia Dairy Industries Pte Ltd | East | Commercial | OE | SSO | Simei |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SSO | Simei |
| Apro Asian Protection Pte Ltd | Island Wide | - | OM | SSO | Simei |
| Securus Pte Ltd | Island Wide | - | OE | SSO | Simei |
| Securus Pte Ltd | Island Wide | - | OE | SSO | Simei |
