| Pan Pacific Singapore | South | In-House | Security Mgt | SSO | Boon Lay |
| Acestes Pte Ltd | Central | - | Security Mgt | SS | Bukit Batok |
| AGS Integration Pte. Ltd. | West | In-House | SS | SS | Bukit Batok |
| G4S Secure Solutions (Singapore) Pte Ltd | West | Industrial / Factory | SS | SS | Pioneer |
| Star Security Services | Island Wide | - | Security Mgt | CSO | Bukit Panjang |
| AGS Integration Pte. Ltd. | West | In-House | SS | SS | Woodlands |
| Guthrie FMC Security Pte Ltd | Island Wide | - | OE | SS | Clementi |
| Inhouse Employer | Central | Hotel | OE | SSO | Hougang |
| Aedge Services Pte Ltd | Island Wide | - | OM | SS | Pioneer |
| Star Security Services | Island Wide | - | Security Mgt | SS | Yishun |
| Fervour Pte Ltd | Island Wide | - | OM | CSO | Toa Payoh |
| Crowne Plaza Changi Airport | East | In-House | OE | SSS | Toa Payoh |
| Eagle I Security Services Pte Ltd | Island Wide | - | OE | SS | Bukit Panjang |
| Crowne Plaza Changi Airport | East | In-House | OM | CSO | Tampines West |
| SATS Ltd | Island Wide | - | OM | Nil | Ang Mo Kio |
| ARSLAN SRS Singapore | South | In-House | RSOC/CAMS Op | SSS | Jurong East |
| Elitez Security Pte Ltd | Central | Commercial | SSS | SSS | Tanjong Pagar |
| RAS Security Pte Ltd | North | Commercial | SSO | SSO | Bukit Batok |
| G4S Secure Solutions (Singapore) Pte Ltd | Island Wide | - | OE | SS | Clementi |
| Acestes Pte Ltd | Island Wide | - | OM | SS | Punggol |
| ProtectPlus Pte Ltd | Island Wide | - | OE | SS | Bukit Panjang |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| Inhouse Employer | East | Hotel | Security Mgt | SS | Bukit Panjang |
| Ranger Investigation & Security Services Pte Ltd | Central | Condominium | SO | SSO | Woodlands |
| Metropolis Security Systems Pte Ltd | West | Industrial / Factory | SSO | SSO | Bukit Batok |
