| Total Protection Solutions Pte Ltd | Island Wide | - | OM | CSO | Pasir Ris |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OM | CSO | Pasir Ris |
| Kingston Property Maintenance Services Pte Ltd | Central | - | SS | SSS | Tanjong Pagar |
| SECOM Singapore Pte Ltd | Island Wide | - | OE | SO | Bukit Batok |
| ProtectPlus Pte Ltd | Island Wide | - | OE | SS | Ang Mo Kio |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | - | SSS | SS | Ang Mo Kio |
| Metropolis Security Systems Pte Ltd | Island Wide | - | OE | SS | Ang Mo Kio |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SS | Ang Mo Kio |
| FormTeam Consultancy Pte Ltd | Island Wide | - | OE | SS | Ang Mo Kio |
| PICO Guards Pte Ltd | South | - | SSS | SS | Ang Mo Kio |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OM | CSO | Pasir Ris |
| SATS Ltd | Island Wide | - | OM | CSO | Pasir Ris |
| Total Protection Solutions Pte Ltd | Island Wide | - | OM | CSO | Pasir Ris |
| FormTeam Consultancy Pte Ltd | Island Wide | - | OE | Nil | Ang Mo Kio |
| Soverus Pte Ltd | Island Wide | - | SSS | SO | Jurong East |
| Securus Pte Ltd | Island Wide | - | OE | CSO | Sengkang |
| Prosec Services Pte Ltd | East | - | SSO | SSO | Tampines |
| SATS Ltd | East | - | OE | SS | Eunos |
| Apro Asian Protection Pte Ltd | Island Wide | - | OM | SS | Tampines |
| Prosegur Singapore Pte Ltd | Island Wide | - | OE | SS | Tampines |
| Union Security Services Pte. Ltd. | North | - | SSO | SS | Bukit Panjang |
| SATS Ltd | East | - | OE | SSS | Sengkang |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| Guthrie FMC Security Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| Peregrine Security Pte. Ltd. | Island Wide | - | OE | SSS | Sengkang |
