| Premier Security Co-operative Ltd | East | In-House | Office Team | SSS | Sengkang |
| Security & Risk Solutions Pte. Ltd. | South | Office Building | SSS | CSO | Boon Lay |
| JEN Singapore Tanglin by Shangri-La | Central | In-House | OM | SS | MacPherson |
| AGS Integration Pte. Ltd. | West | In-House | SS | SSO | Boon Lay |
| Orchid Hotel Private Limited | Central | In-House | OM | SSS | Yishun |
| Union Security Services Pte. Ltd. | East | Data Centre | SS | SS | Woodlands |
| Ascentiaa Security Management Pte Ltd | Island Wide | - | SS | SO | - |
| Overseas (Singapore) Security & Private Investigation Consultants Pte Ltd | Island Wide | - | OE | SS | Clementi |
| SMS Investigation & Security Pte Ltd | Central | Commercial | SS | CSO | Clementi |
| SATS Ltd | Island Wide | - | OM | CSO | Pasir Ris |
| TwinRock Global | Central | - | Security Mgt | CSO | Marsiling |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OM | SSS | Choa Chu Kang |
| Regal Security & Fire Management Services Pte Ltd | Central | - | OE | SSS | Pioneer |
| Grand Copthorne Waterfront Hotel | Central | In-House | Security Mgt | SS | Bukit Panjang |
| PICO Guards Pte Ltd | North | Data Centre | SS | SS | Ang Mo Kio |
| Eagle I Security Services Pte Ltd | Island Wide | - | OE | SS | Marsiling |
| Inhouse Employer | South | School | SO | SS | Bukit Batok |
| ProtectPlus Pte Ltd | Island Wide | - | OE | SS | Hougang |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OM | SSS | Bukit Panjang |
| GWC Commercial Pte. Ltd. | Central | Commercial | SO | SO | Bedok |
| G4S Secure Solutions (Singapore) Pte Ltd | West | Commercial | SS | SO | Jurong East |
| M Hotel Singapore City Centre | Central | Hotel | SSO | SSS | Tampines |
| Fervour Pte Ltd | Island Wide | - | OM | SS | Bukit Batok |
| Titanium Safety & Security Pte Ltd | North | In-House | OE | SS | Marsiling |
| Titanium Safety & Security Pte Ltd | North | In-House | SSO | SSO | Boon Lay |
