| Certis Group | East | Gov Building | SO | SO | Sengkang |
| Jasa Investigation & Security Services Pte Ltd | Central | Healthcare | SSO | SO | Bukit Batok |
| Inhouse Employer | East | In-House | SO | SO | Bedok |
| GATES PCM Integrated Services Pte Ltd | Central | School | SO | SSO | - |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SS | Tampines East |
| Reachfield Security & Safety Management Pte Ltd | Central | Commercial | SSO | SO | Bukit Batok |
| Orchid Hotel Private Limited | Central | In-House | OM | CSO | Pasir Ris |
| Pedro Investigations & Security Services Pte. Ltd. | Central | - | SSO | CSO | Bedok |
| G4S Secure Solutions (Singapore) Pte Ltd | South | - | SO | SO | Bukit Batok |
| Artyzen Singapore | Central | Hotel | SS | SS | Marsiling |
| SMS Security | East | Mix-Development | SSO | SSO | Potong Pasir |
| Force-One Security | Central | Commercial | SO | SO | Yishun |
| GoMobile Security Solutions Pte Ltd | Island Wide | - | OM | SS | Hougang |
| Orchid Hotel Private Limited | Central | In-House | OM | SS | Punggol |
| FormTeam Consultancy Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| Regal Security & Fire Management Services Pte Ltd | Central | - | OE | SSS | Bukit Batok |
| SATS Ltd | Island Wide | - | OM | SS | Choa Chu Kang |
| Union Security Services Pte. Ltd. | East | Data Centre | SS | SO | Tampines |
| Acestes Pte Ltd | East | Condominium | SO | SSO | Sengkang |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SS | SS | Yishun |
| Aigle Security Pte Ltd | South | Condominium | SSO | SS | Aljunied |
| SATS Ltd | Island Wide | - | OM | SSS | Woodlands |
| Sands Global Pte Ltd | East | Condominium | SO | SO | Pasir Ris |
| SATS Ltd | Island Wide | - | OM | CSO | Marsiling |
| Orchid Hotel Private Limited | Central | In-House | OM | Nil | Yishun |
