| Security Masters Pte Ltd | Island Wide | - | SS | SS | Sengkang |
| Union Security Services Pte. Ltd. | Island Wide | - | SSO | SO | Bukit Batok |
| Metropolis Security Systems Pte Ltd | Island Wide | - | OE | SO | Bukit Batok |
| Guthrie FMC Security Pte Ltd | Island Wide | - | OE | CSO | Bedok |
| Union Security Services Pte. Ltd. | Island Wide | - | SSO | SO | Bukit Batok |
| SMS Investigation & Security Pte Ltd | Island Wide | - | SSO | SO | Bukit Batok |
| Union Security Services Pte. Ltd. | Island Wide | - | SSO | SO | Bukit Batok |
| SATS Ltd | Island Wide | - | OM | SS | Tampines |
| Global Ritz Protection (Security Services) Pte Ltd | Island Wide | - | OE | SSS | Dover |
| Guthrie FMC Security Pte Ltd | Island Wide | - | OE | SSS | Dover |
| Premier Security Co-operative Ltd | Island Wide | - | SSO | Nil | Sengkang |
| Security Masters Pte Ltd | Island Wide | - | SS | SS | Jurong East |
| Peregrine Security Pte. Ltd. | Island Wide | - | OE | CSO | Toa Payoh |
| Security Masters Pte Ltd | Island Wide | - | SS | SS | Hougang |
| Securus Pte Ltd | Island Wide | - | OM | SS | Hougang |
| Fervour Pte Ltd | Island Wide | - | OM | SS | Hougang |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OE | CSO | Toa Payoh |
| Total Protection Solutions Pte Ltd | Island Wide | - | OM | Nil | - |
| Guthrie FMC Security Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| Peregrine Security Pte. Ltd. | Island Wide | - | OE | CSO | Marsiling |
| Soverus Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| Guthrie FMC Security Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| Overseas (Singapore) Security & Private Investigation Consultants Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| SATS Ltd | Island Wide | - | OM | CSO | Marsiling |
| Fervour Pte Ltd | Island Wide | - | OM | CSO | Marsiling |
