| AGS Integration Pte. Ltd. | West | In-House | SS | SSO | - |
| G4S Secure Solutions (Singapore) Pte Ltd | West | School | SSO | SSO | Pioneer |
| Pan Pacific Singapore | South | In-House | Security Mgt | SSO | Boon Lay |
| William Secure Solutions Pte Ltd | West | Dormitory | SSO | SSO | Pioneer |
| Titanium Safety & Security Pte Ltd | North | In-House | OE | SSO | Sembawang |
| GATES PCM Integrated Services Pte Ltd | West | Gov Building | SSO | SSO | Boon Lay |
| SATS Ltd | Island Wide | - | Inves | SSO | Boon Lay |
| GATES PCM Integrated Services Pte Ltd | West | Gov Building | SSO | SSO | Boon Lay |
| Union Security Services Pte. Ltd. | North | Commercial | SS | SSO | Sembawang |
| Certis Group | East | - | SO | SSO | Simei |
| Uniforce Security Services Pte Ltd | Island Wide | - | OE | SSO | Sembawang |
| Strive Security Pte Ltd | Island Wide | - | OE | SSO | Sembawang |
| Titanium Safety & Security Pte Ltd | Island Wide | - | OE | SSO | Sembawang |
| Crowne Plaza Changi Airport | East | Hotel | SSO | SSO | Simei |
| RAS Security Pte Ltd | North | Commercial | SSO | SSO | Bukit Batok |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SSO | Simei |
| Prosec Services Pte Ltd | Central | Commercial | SSO | SSO | - |
| Dragnet Smartech Security Pte Ltd | Central | Commercial | SSO | SSO | - |
| Securus Pte Ltd | Island Wide | - | OE | SSO | Hougang |
| Aero Asia Security Systems Pte Ltd | Island Wide | - | OE | SSO | Hougang |
| Titanium Safety & Security Pte Ltd | Island Wide | - | OE | SSO | Hougang |
| Fervour Pte Ltd | North | Data Centre | SO | SSO | Woodlands |
| Guthrie FMC Security Pte Ltd | Island Wide | - | OE | SSO | Hougang |
| Malaysia Dairy Industries Pte Ltd | East | Commercial | OE | SSO | Hougang |
| Inhouse Employer | Island Wide | - | OE | SSO | Hougang |
