| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SS | Sengkang |
| Peregrine Security Pte. Ltd. | Island Wide | - | OE | SS | Sengkang |
| Stalwart Security Pte Ltd | Island Wide | - | OE | SS | Sengkang |
| Titanium Safety & Security Pte Ltd | North | In-House | OE | SS | Sengkang |
| Eagle I Security Services Pte Ltd | Island Wide | - | OE | SS | Sengkang |
| Soverus Pte Ltd | Island Wide | - | OE | SS | Sengkang |
| Aigle Security Pte Ltd | Island Wide | - | OE | SS | Sengkang |
| Metropolis Security Systems Pte Ltd | Island Wide | - | OE | SO | Bukit Batok |
| JEN Singapore Tanglin by Shangri-La | Central | In-House | OE | SO | Bukit Batok |
| Inhouse Employer | West | School | OE | SS | Jurong East |
| Guthrie FMC Security Pte Ltd | Island Wide | - | OE | CSO | Bedok |
| TwinRock Global | Central | - | OE | CSO | Bedok |
| Global Ritz Protection (Security Services) Pte Ltd | Island Wide | - | OE | SSS | Dover |
| Guthrie FMC Security Pte Ltd | Island Wide | - | OE | SSS | Dover |
| Malaysia Dairy Industries Pte Ltd | East | Commercial | OE | SSS | Punggol |
| SATS Ltd | East | - | OE | CSO | Toa Payoh |
| Peregrine Security Pte. Ltd. | Island Wide | - | OE | CSO | Toa Payoh |
| SATS Ltd | East | - | OE | SS | Hougang |
| TwinRock Global | Central | - | OE | SS | Hougang |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OE | CSO | Toa Payoh |
| 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 |
| SATS Ltd | East | - | OE | CSO | Marsiling |
| Guthrie FMC Security Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
