| Union Security Services Pte. Ltd. | North | - | SSO | SSS | Yishun |
| SMS Investigation & Security Pte Ltd | Central | - | OM | SSS | Yishun |
| Soverus Pte Ltd | Island Wide | - | SSS | SSS | Yishun |
| Overseas (Singapore) Security & Private Investigation Consultants Pte Ltd | Island Wide | - | OE | SSS | Yishun |
| G4S Secure Solutions (Singapore) Pte Ltd | Island Wide | - | OE | SSS | Yishun |
| AGS Integration Pte. Ltd. | Island Wide | - | OE | SSS | Yishun |
| Kingston Property Maintenance Services Pte Ltd | Central | - | SS | SSS | Yishun |
| Kingston Property Maintenance Services Pte Ltd | Central | - | SS | SSS | Yishun |
| TwinRock Global | Central | - | Security Mgt | SSS | Yishun |
| Securus Pte Ltd | Island Wide | - | OM | SSS | Yishun |
| AGS Integration Pte. Ltd. | Island Wide | - | OE | SSS | Yishun |
| Total Protection Solutions Pte Ltd | Island Wide | - | OM | SSS | Yishun |
| Overseas (Singapore) Security & Private Investigation Consultants Pte Ltd | Island Wide | - | OE | SSS | Yishun |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OM | SSS | Yishun |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SSS | Yishun |
| SMS Investigation & Security Pte Ltd | Central | - | OM | SSS | Yishun |
| Peregrine Security Pte. Ltd. | Island Wide | - | OE | SSS | Yishun |
| PICO Guards Pte Ltd | Island Wide | - | OM | SSS | Yishun |
| Regal Security & Fire Management Services Pte Ltd | Central | - | OE | SSS | Yishun |
| FormTeam Consultancy Pte Ltd | Island Wide | - | OE | SSS | Yishun |
| Soverus Pte Ltd | Island Wide | - | SSS | SSS | Yishun |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | - | Security Mgt | SSS | Yishun |
| Fervour Pte Ltd | Island Wide | - | OM | SSS | Yishun |
| Prosec Services Pte Ltd | East | - | SSO | SSO | Tampines |
| Prosegur Singapore Pte Ltd | Island Wide | - | OE | SS | Tampines |
