| Force-One Security | North | Data Centre | OE | SS | Yishun |
| Securus Pte Ltd | Island Wide | - | OE | SS | Yishun |
| SATS Ltd | Island Wide | - | Inves | Nil | Yishun |
| Star Security Services | Island Wide | - | Security Mgt | Nil | Yishun |
| GoMobile Security Solutions Pte Ltd | Island Wide | - | OM | Nil | Yishun |
| Certis Group | Island Wide | - | SSO | SO | Yishun |
| Force-One Security | North | Data Centre | SS | SS | Yishun |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SS | Yishun |
| Star Security Services | Island Wide | - | Security Mgt | SS | Yishun |
| RAS Security Pte Ltd | North | Commercial | OE | SS | Yishun |
| Eagle I Security Services Pte Ltd | Island Wide | - | OE | SS | Yishun |
| Labourtel Management Corporation Pte Ltd | West | Dormitory | CSO | SSS | Yishun |
| Acestes Pte Ltd | Island Wide | - | OM | SSS | Yishun |
| Soverus Pte Ltd | Island Wide | - | OE | SSS | Yishun |
| SATS Ltd | East | - | OE | SSS | Yishun |
| SATS Ltd | East | - | OE | SSS | Yishun |
| Pan Pacific Singapore | South | In-House | Security Mgt | SSS | Yishun |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OM | SSS | Yishun |
| Peregrine Security Pte. Ltd. | Island Wide | - | OE | SSS | Yishun |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | School | SO | SO | Yishun |
| Acestes Pte Ltd | Central | - | Security Mgt | Nil | Yishun |
| Pan Pacific Singapore | South | In-House | Security Mgt | SSS | Yishun |
| Pan Pacific Singapore | South | In-House | Security Mgt | SSS | Yishun |
| Pan Pacific Singapore | South | In-House | Security Mgt | SSS | Yishun |
| Aspectus Consultancy Pte Ltd | North | Industrial / Factory | SO | SSO | Yishun |
