| G4S Secure Solutions (Singapore) Pte Ltd | East | In-House | SSO | SSO | Simei |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SSO | Simei |
| G4S Secure Solutions (Singapore) Pte Ltd | Central | In-House | SSO | SSO | Simei |
| Crowne Plaza Changi Airport | East | In-House | OE | SSO | Simei |
| Premier Security Co-operative Ltd | Island Wide | - | SSO | SSO | Simei |
| Crowne Plaza Changi Airport | East | In-House | OE | SSO | Simei |
| Elitez Security Pte Ltd | Central | Condominium | SO | SSO | - |
| Peregrine Security Pte. Ltd. | Central | - | SSO | SSO | Tampines |
| GATES PCM Integrated Services Pte Ltd | Central | School | SO | SSO | - |
| Union Security Services Pte. Ltd. | Island Wide | - | SSO | SSO | - |
| Titanium Safety & Security Pte Ltd | North | In-House | SSO | SSO | - |
| Inhouse Employer | Central | Healthcare | OE | SSO | Hougang |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | - | Security Mgt | SSO | Woodlands |
| GoMobile Security Solutions Pte Ltd | Island Wide | - | OM | SSO | Woodlands |
| Acestes Pte Ltd | Central | - | Security Mgt | SSO | Woodlands |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SSO | Punggol |
| SATS Ltd | Island Wide | - | OM | SSO | Hougang |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SSO | Simei |
| Mainguard Security Services (S) Pte Ltd | East | Healthcare | SSO | SSO | Simei |
| Premier Security Co-operative Ltd | Island Wide | - | SSO | SSO | Simei |
| Force-One Security | Central | Commercial | SO | SSO | Woodlands |
| Acestes Pte Ltd | Central | - | Security Mgt | SSO | Simei |
| Securus Pte Ltd | Island Wide | - | OE | SSO | Simei |
| Union Security Services Pte. Ltd. | East | Data Centre | SS | SSO | Simei |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SSO | Simei |
