| Inhouse Employer | East | In-House | SO | SS | Sengkang |
| SMS Investigation & Security Pte Ltd | Central | - | OM | SSS | Sengkang |
| Chang & Chang Security Management Pte. Ltd. | West | Condominium | SO | SO | Choa Chu Kang |
| Force-One Security | North | Data Centre | SO | SO | Serangoon |
| SATS Ltd | East | - | OE | SSO | Clementi |
| Acestes Pte Ltd | Island Wide | - | OM | CSO | Punggol |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SS | Bukit Batok |
| AGS Integration Pte. Ltd. | West | In-House | SS | SS | Boon Lay |
| JEN Singapore Tanglin by Shangri-La | Central | In-House | OE | SSO | Bukit Batok |
| Union Security Services Pte. Ltd. | East | Data Centre | SS | SSO | Jurong East |
| Premier Security Co-operative Ltd | Central | Commercial | SS | SS | Toa Payoh |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SSO | Pasir Ris |
| SATS Ltd | Island Wide | - | OM | SO | Sengkang |
| GWC Commercial Pte. Ltd. | Central | Commercial | SO | SSO | - |
| Inhouse Employer | Island Wide | Construction | OM | SSO | Hougang |
| Acestes Pte Ltd | Central | - | Security Mgt | Nil | Tampines West |
| Securus Pte Ltd | Island Wide | Commercial | SO | SO | Tampines |
| First Security & Private Investigation (Singapore) Pte Ltd | Central | Hotel | SSO | SSO | - |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SSO | Woodlands |
| Acestes Pte Ltd | Central | - | Security Mgt | CSO | Bedok |
| Inhouse Employer | Island Wide | Construction | OM | CSO | Bukit Batok |
| Legion Protection Pte Ltd | Island Wide | - | OE | SS | Bukit Panjang |
| Soverus Pte Ltd | Island Wide | - | SSS | CSO | Tampines |
| Fervour Pte Ltd | North | Data Centre | SO | SSO | Woodlands |
| First Security & Private Investigation (Singapore) Pte Ltd | North | Condominium | SO | SSO | Woodlands |
