| Total Protection Solutions Pte Ltd | Island Wide | - | OM | CSO | Marsiling |
| SMS Investigation & Security Pte Ltd | Central | - | OM | CSO | Marsiling |
| Securus Pte Ltd | Island Wide | - | OM | CSO | Marsiling |
| Inhouse Employer | Island Wide | - | OE | CSO | Marsiling |
| Securus Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| Trek Investigations & Security Management Services Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| PICO Guards Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| Union Security Services Pte. Ltd. | Island Wide | - | OE | CSO | Marsiling |
| Peregrine Security Pte. Ltd. | Island Wide | - | OE | CSO | Marsiling |
| G4S Secure Solutions (Singapore) Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| Regal Security & Fire Management Services Pte Ltd | Central | - | OE | CSO | Marsiling |
| Overseas (Singapore) Security & Private Investigation Consultants Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| ProtectPlus Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| SATS Ltd | East | - | OE | CSO | Marsiling |
| Guthrie FMC Security Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| Soverus Pte Ltd | Island Wide | - | SSS | CSO | Marsiling |
| Total Protection Solutions Pte Ltd | Island Wide | - | OM | CSO | Queenstown |
| Eagle I Security Services Pte Ltd | Island Wide | - | OE | Nil | Telok Blangah |
| FormTeam Consultancy Pte Ltd | Island Wide | - | OE | Nil | Lakeside |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OE | SSO | Tuas Link |
| Acestes Pte Ltd | Central | - | Security Mgt | SS | Pasir Ris |
| TwinRock Global | Central | - | Security Mgt | SS | Pasir Ris |
| Soverus Pte Ltd | Island Wide | - | SSS | SSS | Yishun |
| Trek Investigations & Security Management Services Pte Ltd | Island Wide | - | OE | Nil | Ang Mo Kio |
| GoMobile Security Solutions Pte Ltd | Island Wide | - | OM | Nil | Ang Mo Kio |
