| Total Protection Solutions Pte Ltd | Island Wide | - | OM | Nil | Tampines |
| Ascentiaa Security Management Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Star Security Services | Island Wide | - | OE | SS | Woodlands |
| Mainguard Security Services (S) Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Premier Security Co-operative Ltd | Island Wide | - | SS | SS | Jurong East |
| Mainguard Security Services (S) Pte Ltd | West | - | SS | SS | - |
| Legion Protection Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Metropolis Security Systems Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Overseas (Singapore) Security & Private Investigation Consultants Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Total Protection Solutions Pte Ltd | Island Wide | - | OM | SO | Tampines |
| AETOS Holdings Pte Ltd | West | - | SO | SO | Marsiling |
| Dragnet Smartech Security Pte Ltd | Central | - | Security Mgt | CSO | Choa Chu Kang |
| AETOS Holdings Pte Ltd | West | - | SO | SS | Marsiling |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OM | Nil | Tampines |
| AETOS Holdings Pte Ltd | West | - | SO | Nil | Ubi |
| Titanium Safety & Security Pte Ltd | Island Wide | - | OE | SO | Woodlands |
| SATS Ltd | East | - | OE | SO | Woodlands |
| Total Protection Solutions Pte Ltd | Island Wide | - | OM | CSO | Choa Chu Kang |
| SATS Ltd | Island Wide | - | OM | CSO | Choa Chu Kang |
| ProtectPlus Pte Ltd | Island Wide | - | OE | SSO | Jurong East |
| Union Security Services Pte. Ltd. | Island Wide | - | OE | SS | Woodlands |
| ProtectPlus Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Mainguard Security Services (S) Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Trek Investigations & Security Management Services Pte Ltd | Island Wide | - | OE | SS | Sengkang |
| Acestes Pte Ltd | Central | - | Security Mgt | SS | Sengkang |
