| Apro Asian Protection Pte Ltd | Island Wide | - | OM | SSS | Woodlands |
| Global Ritz Protection (Security Services) Pte Ltd | Island Wide | - | OE | SS | Sengkang |
| Certis Group | Island Wide | - | SSO | SS | Sengkang |
| Certis Group | East | - | SO | SS | Simei |
| Star Security Services | Island Wide | - | Security Mgt | CSO | Boon Lay |
| SATS Ltd | Island Wide | - | OM | SSS | Queenstown |
| Inhouse Employer | Island Wide | - | OE | CSO | Marsiling |
| SATS Ltd | Island Wide | - | Inves | Nil | Tampines East |
| SATS Ltd | Island Wide | - | OM | Nil | Novena |
| Kingston Property Maintenance Services Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| SATS Ltd | East | - | OE | CSO | Pasir Ris |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OM | SSS | Chinese Garden |
| Peregrine Security Pte. Ltd. | Island Wide | - | OE | CSO | Marsiling |
| Soverus Pte Ltd | Island Wide | - | SSS | CSO | Marsiling |
| GoMobile Security Solutions Pte Ltd | Island Wide | - | OM | CSO | Marsiling |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| Concorde Security Pte Ltd | Island Wide | - | OE | SO | Yishun |
| Premier Security Co-operative Ltd | Island Wide | - | SS | SS | Bukit Panjang |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | CSO | Pasir Ris |
| SATS Ltd | East | - | OE | CSO | Pasir Ris |
| Trek Investigations & Security Management Services Pte Ltd | Island Wide | - | OE | CSO | Pasir Ris |
| Regal Security & Fire Management Services Pte Ltd | Central | - | OE | CSO | Pasir Ris |
| Union Security Services Pte. Ltd. | Island Wide | - | OE | CSO | Pasir Ris |
| Star Security Services | Island Wide | - | OE | CSO | Pasir Ris |
| Guthrie FMC Security Pte Ltd | Island Wide | - | OE | CSO | Pasir Ris |
