| SATS Ltd | Island Wide | - | OM | SSS | Punggol |
| AGS Integration Pte. Ltd. | Island Wide | - | OE | SSS | Tampines West |
| Titanium Safety & Security Pte Ltd | North | In-House | SSO | SSO | Bukit Batok |
| Star Security Services | Island Wide | - | Security Mgt | CSO | Boon Lay |
| Inhouse Employer | Central | Hotel | SS | SS | Yishun |
| Aigle Security Pte Ltd | Island Wide | - | OE | CSO | Bedok |
| Securus Pte Ltd | Island Wide | - | OE | CSO | Sengkang |
| G4S Secure Solutions (Singapore) Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| Pedro Investigations & Security Services Pte. Ltd. | Central | - | SSO | SO | Bukit Batok |
| FormTeam Consultancy Pte Ltd | Island Wide | - | OE | SS | Ang Mo Kio |
| Securus Pte Ltd | Island Wide | - | OE | CSO | Bedok |
| Inhouse Employer | Central | Hotel | SS | SS | HarbourFront |
| Premier Security Co-operative Ltd | Central | Commercial | SS | SS | Hougang |
| Reachfield Security & Safety Management Pte Ltd | North | Commercial | SO | SS | Woodlands South |
| Mahesh | Central | In-House | SO | SS | Aljunied |
| First Security & Private Investigation (Singapore) Pte Ltd | North | Condominium | SO | SO | Woodlands |
| Star Security Services | Island Wide | - | Security Mgt | SS | - |
| Orchid Hotel Private Limited | Central | In-House | OM | SS | Hougang |
| Reachfield Security & Safety Management Pte Ltd | Central | School | SO | SSO | Jurong East |
| Premier Security Co-operative Ltd | West | Dormitory | SO | SO | Bukit Gombak |
| Reachfield Security & Safety Management Pte Ltd | Central | School | Security Mgt | SS | Woodlands |
| Aigle Security Pte Ltd | Island Wide | - | OE | SS | Admiralty |
| Inhouse Employer | Central | School | SO | SSS | Marsiling |
| Kingston Property Maintenance Services Pte Ltd | East | Condominium | SSO | SS | Aljunied |
| ARSLAN SRS Singapore | South | In-House | RSOC/CAMS Op | CSO | Boon Lay |
