| First Security & Private Investigation (Singapore) Pte Ltd | North | Condominium | SO | SSO | Woodlands |
| PICO Guards Pte Ltd | Island Wide | - | OM | CSO | Tampines |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SSS | Tampines |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SSO | Bedok North |
| Inhouse Employer | Central | Hotel | SO | SSO | Woodlands |
| Kingston Property Maintenance Services Pte Ltd | Central | Mix-Development | SS | SS | Marsiling |
| Orchid Hotel Private Limited | Central | In-House | OM | SSS | Queenstown |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SSO | Eunos |
| Certis Group | Island Wide | - | SSO | SSO | Choa Chu Kang |
| Aero Asia Security Systems Pte Ltd | South | Condominium | SO | SO | Redhill |
| TwinRock Global | South | Condominium | SO | SSS | Clementi |
| Kingston Property Maintenance Services Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| Inhouse Employer | North | Industrial / Factory | SSO | SSO | Yishun |
| GATES PCM Integrated Services Pte Ltd | Central | Gov Building | SO | SS | Pioneer |
| Pan Pacific Singapore | South | In-House | Security Mgt | SS | - |
| SMS Security | East | Mix-Development | SSO | SS | Aljunied |
| Ascentiaa Security Management Pte Ltd | Island Wide | - | SS | SO | - |
| Ascentiaa Security Management Pte Ltd | Island Wide | - | SS | SS | Bukit Batok |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SS | Bukit Batok |
| Inhouse Employer | Central | School | SO | SSS | Marsiling |
| Reachfield Security & Safety Management Pte Ltd | East | School | SO | SO | Punggol |
| Securus Pte Ltd | Island Wide | - | OE | CSO | Bedok |
| York Hotel (Private) Limited | Central | In-House | OM | SO | Yishun |
| GATES PCM Integrated Services Pte Ltd | West | Gov Building | SSO | SSO | Boon Lay |
