| SATS Ltd | East | - | OE | SSO | Simei |
| Crowne Plaza Changi Airport | East | In-House | OE | SSO | Simei |
| Titanium Safety & Security Pte Ltd | Island Wide | - | OE | CSO | Tampines |
| Strive Security Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| Inhouse Employer | West | School | OE | SS | Kranji |
| Aero Asia Security Systems Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SSO | Simei |
| Aero Asia Security Systems Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| Guthrie FMC Security Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| Shine Security Agency Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| Aero Asia Security Systems Pte Ltd | Island Wide | - | OE | Nil | Yishun |
| Trek Investigations & Security Management Services Pte Ltd | Island Wide | - | OE | Nil | Yishun |
| Peregrine Security Pte. Ltd. | Island Wide | - | OE | CSO | Marsiling |
| Soverus Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| Uniforce Security Services Pte Ltd | Island Wide | - | OE | SS | Dover |
| Inhouse Employer | South | In-House | OE | SS | Dover |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SS | Dover |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | Nil | Yishun |
| Aero Asia Security Systems Pte Ltd | Island Wide | - | OE | CSO | Tampines |
| Guthrie FMC Security Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| Aero Asia Security Systems Pte Ltd | Island Wide | - | OE | Nil | Jurong East |
| Aero Asia Security Systems Pte Ltd | Island Wide | - | OE | Nil | Yishun |
| Aero Asia Security Systems Pte Ltd | Island Wide | - | OE | SO | Bedok |
| Shine Security Agency Pte Ltd | Island Wide | - | OE | SO | Bukit Batok |
