| Prosec Services Pte Ltd | East | Retail | SSO | SSS | Yishun |
| FormTeam Consultancy Pte Ltd | Island Wide | - | OE | CSO | Yishun |
| SATS Ltd | Island Wide | Commercial | APO | SO | Yishun |
| Union Security Services Pte. Ltd. | East | Data Centre | SS | SS | Yishun |
| Union Security Services Pte. Ltd. | East | Data Centre | SS | SS | Yishun |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | Commercial | SS | SS | Yishun |
| G4S Secure Solutions (Singapore) Pte Ltd | North | School | SSO | SSO | Yishun |
| TwinRock Global | North | Dormitory | SO | SO | Yishun |
| Metropolis Security Systems Pte Ltd | North | Condominium | SO | SO | Yishun |
| Regal Security & Fire Management Services Pte Ltd | Central | - | OE | CSO | Yishun |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OM | SSS | Yishun |
| Soverus Pte Ltd | Island Wide | - | SSS | SSS | Yishun |
| M Social Singapore | Central | Hotel | Sec Tech / Eng | CSO | Yishun |
| SATS Ltd | Island Wide | - | OM | CSO | Yishun |
| Certis Group | Island Wide | - | SO | CSO | Yishun |
| Inhouse Employer | Central | In-House | SO | CSO | Yishun |
| Inhouse Employer | South | In-House | SO | CSO | Yishun |
| Inhouse Employer | North | In-House | SO | CSO | Yishun |
| Inhouse Employer | North | In-House | SO | CSO | Yishun |
| Inhouse Employer | Central | In-House | SSS | CSO | Yishun |
| Force-One Security | North | Data Centre | SO | SO | Yishun |
| TwinRock Global | Central | Gov Building | SO | SO | Yishun |
| Soverus Pte Ltd | North | Industrial / Factory | SO | SO | Yishun |
| Inhouse Employer | North | In-House | SO | SO | Yishun |
| York Hotel (Private) Limited | Central | In-House | OM | SS | Yishun |
