| Overseas (Singapore) Security & Private Investigation Consultants Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| SATS Ltd | East | - | OE | CSO | Marsiling |
| Crowne Plaza Changi Airport | East | In-House | OE | CSO | Marsiling |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| Guthrie FMC Security Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | Commercial | OE | CSO | Marsiling |
| Security Masters Pte Ltd | North | Commercial | CSO | CSO | Marsiling |
| Labourtel Management Corporation Pte Ltd | West | Dormitory | CSO | CSO | Marsiling |
| Premier Security Co-operative Ltd | North | School | SSS | CSO | Marsiling |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | - | SSS | CSO | Marsiling |
| Ademco Security Pte Ltd | South | Mix-Development | SSS | CSO | Marsiling |
| Premier Security Co-operative Ltd | Central | Healthcare | SSS | CSO | Marsiling |
| Prosec Services Pte Ltd | East | Data Centre | SSS | CSO | Marsiling |
| Inhouse Employer | Central | In-House | SSS | CSO | Marsiling |
| Securus Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| Inhouse Employer | Island Wide | - | OE | CSO | Marsiling |
| Peregrine Security Pte. Ltd. | Island Wide | - | OE | CSO | Marsiling |
| Soverus Pte Ltd | Island Wide | - | SSS | CSO | Marsiling |
| GoMobile Security Solutions Pte Ltd | Island Wide | - | OM | CSO | Marsiling |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | Commercial | OE | CSO | Marsiling |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | - | SSS | CSO | Marsiling |
| ProtectPlus Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| Guthrie FMC Security Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| Kingston Property Maintenance Services Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
