| Titanium Safety & Security Pte Ltd | North | In-House | OE | CSO | Pasir Ris |
| Securus Pte Ltd | Island Wide | - | OE | CSO | Pasir Ris |
| Regal Security & Fire Management Services Pte Ltd | Central | - | OE | CSO | Pasir Ris |
| Trek Investigations & Security Management Services Pte Ltd | Island Wide | - | OE | CSO | Pasir Ris |
| AGS Integration Pte. Ltd. | Island Wide | - | OE | CSO | Pasir Ris |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | CSO | Pasir Ris |
| Uniforce Security Services Pte Ltd | Island Wide | - | OE | CSO | Pasir Ris |
| SATS Ltd | East | - | OE | CSO | Pasir Ris |
| ProtectPlus Pte Ltd | Island Wide | - | OE | CSO | Pasir Ris |
| Guthrie FMC Security Pte Ltd | Island Wide | - | OE | CSO | Pasir Ris |
| Kingston Property Maintenance Services Pte Ltd | Island Wide | - | OE | CSO | Pasir Ris |
| Union Security Services Pte. Ltd. | Island Wide | - | OE | CSO | Pasir Ris |
| Securus Pte Ltd | Island Wide | - | OE | SSS | Yishun |
| ProtectPlus Pte Ltd | Island Wide | - | OE | SO | Marsiling |
| Ademco Security Pte Ltd | Island Wide | - | OE | SS | Geylang Bahru |
| Strive Security Pte Ltd | Island Wide | - | OE | SS | Geylang Bahru |
| Uniforce Security Services Pte Ltd | Island Wide | - | OE | SS | Geylang Bahru |
| Crowne Plaza Changi Airport | East | In-House | OE | SO | Yishun |
| Inhouse Employer | Central | Healthcare | OE | SSO | Serangoon |
| RAS Security Pte Ltd | North | Commercial | OE | SSS | Tiong Bahru |
| RAS Security Pte Ltd | North | Commercial | OE | SS | Bukit Batok |
| Metropolis Security Systems Pte Ltd | Island Wide | - | OE | SS | Bukit Batok |
| Force-One Security | North | Data Centre | OE | SSS | Choa Chu Kang |
| Peregrine Security Pte. Ltd. | Island Wide | - | OE | SSS | Choa Chu Kang |
| Prosegur Singapore Pte Ltd | Island Wide | - | OE | SSS | Punggol |
