| Pan Pacific Singapore | South | In-House | Security Mgt | SS | Sengkang |
| SATS Ltd | Island Wide | - | OM | SO | Sengkang |
| FormTeam Consultancy Pte Ltd | Island Wide | - | OE | SS | Admiralty |
| Inhouse Employer | East | School | SO | SO | Serangoon |
| Prosec Services Pte Ltd | East | Data Centre | SO | SO | Tampines |
| M Social Singapore | Central | Hotel | OE | SS | Sengkang |
| Inhouse Employer | Central | Hotel | SS | SS | HarbourFront |
| G4S Secure Solutions (Singapore) Pte Ltd | South | - | SO | SO | - |
| G4S Secure Solutions (Singapore) Pte Ltd | Central | In-House | SSO | SSO | Pasir Ris |
| Aigle Security Pte Ltd | Island Wide | - | OE | CSO | Bedok |
| Prospect Protection Pte Ltd | East | Industrial / Factory | SO | SO | Simei |
| Securus Pte Ltd | Island Wide | - | OM | CSO | Pasir Ris |
| PICO Guards Pte Ltd | Island Wide | - | OM | SSS | Dover |
| Reachfield Security & Safety Management Pte Ltd | South | Commercial | SS | SSS | Pasir Ris |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | Commercial | SS | SS | Lakeside |
| Certis Group | Central | Commercial | SO | SSO | Bukit Batok |
| Acestes Pte Ltd | Island Wide | - | OM | SSS | Sengkang |
| Legion Protection Pte Ltd | Island Wide | - | OE | SS | Admiralty |
| ProtectPlus Pte Ltd | Island Wide | - | OE | SO | Yishun |
| Inhouse Employer | West | In-House | OM | SS | Hougang |
| Legion Protection Pte Ltd | Island Wide | - | OE | SSS | Tampines |
| Sands Global Pte Ltd | Central | Condominium | SS | SO | Bright Hill |
| York Hotel (Private) Limited | Central | In-House | SS | SS | Sengkang |
| Overseas (Singapore) Security & Private Investigation Consultants Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| York Hotel (Private) Limited | Central | In-House | OM | CSO | Marsiling |
