| Metropolis Security Systems Pte Ltd | North | Mix-Development | SO | SO | Yishun |
| Metropolis Security Systems Pte Ltd | North | Mix-Development | SO | SO | Yishun |
| Hawkeye Security Solutions Pte Ltd | North | Commercial | SO | SO | Yishun |
| Metropolis Security Systems Pte Ltd | North | Condominium | SO | SO | Yishun |
| Union Security Services Pte. Ltd. | North | Commercial | SSO | SSO | Yishun |
| Hawkeye Security Solutions Pte Ltd | North | Commercial | SO | SSO | Yishun |
| Acestes Pte Ltd | Island Wide | - | OM | SSS | Yishun |
| Inhouse Employer | Island Wide | Construction | OM | CSO | Yishun |
| Inhouse Employer | Island Wide | Construction | OM | CSO | Yishun |
| Aedge Services Pte Ltd | Island Wide | - | OM | CSO | Yishun |
| Securitas Guarding Services (Singapore) Pte Ltd | East | Data Centre | SS | CSO | Yishun |
| Peregrine Security Pte. Ltd. | North | Healthcare | SSO | SS | Yishun |
| Peregrine Security Pte. Ltd. | North | Healthcare | SSO | SS | Yishun |
| G4S Secure Solutions (Singapore) Pte Ltd | Island Wide | - | OE | SS | Yishun |
| 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 |
