| Total Protection Solutions Pte Ltd | Island Wide | - | OM | Nil | Bukit Batok |
| RAS Security Pte Ltd | North | Commercial | SSO | SO | Clementi |
| PICO Guards Pte Ltd | North | Data Centre | SO | SSO | Ang Mo Kio |
| Stalwart Security Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Aigle Security Pte Ltd | East | Condominium | SO | SO | Tampines |
| Aedge Services Pte Ltd | West | Industrial / Factory | SO | SO | Bukit Gombak |
| Inhouse Employer | East | In-House | SO | SO | - |
| First Security & Private Investigation (Singapore) Pte Ltd | South | Condominium | SS | SSS | Clementi |
| Sands Global Pte Ltd | Central | Condominium | SS | SO | - |
| Ascentiaa Security Management Pte Ltd | Island Wide | - | SS | SSS | Tampines |
| Inhouse Employer | South | In-House | SSO | SO | Bedok |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SS | Bukit Batok |
| Chang & Chang Security Management Pte. Ltd. | East | Condominium | SS | SS | Tampines |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | - | Security Mgt | CSO | Hougang |
| Aero Asia Security Systems Pte Ltd | Island Wide | - | OE | Nil | Yishun |
| Star Security Services | Island Wide | - | Security Mgt | SS | Kaki Bukit |
| Securus Pte Ltd | Island Wide | - | OE | CSO | Choa Chu Kang |
| Kingston Property Maintenance Services Pte Ltd | West | Condominium | SO | SSS | Clementi |
| Securus Pte Ltd | Island Wide | - | OM | SS | Hougang |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | Nil | Yishun |
| Orchid Hotel Private Limited | Central | In-House | OM | CSO | Punggol |
| Certis Group | East | Gov Building | SO | SO | Bedok |
| G4S Secure Solutions (Singapore) Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| Regal Security & Fire Management Services Pte Ltd | Central | - | OE | SS | Admiralty |
| Regal Security & Fire Management Services Pte Ltd | Central | - | OE | CSO | Marsiling |
