| Force-One Security | North | Data Centre | SO | SO | Yishun |
| Reachfield Security & Safety Management Pte Ltd | North | School | SO | SO | Woodlands |
| PICO Guards Pte Ltd | East | Commercial | SO | SO | Hougang |
| SMS Security | East | Retail / Mall | SO | SO | Eunos |
| Metropolis Security Systems Pte Ltd | East | Condominium | SO | SO | Sengkang |
| SMS Security | East | Retail / Mall | SO | SO | Eunos |
| Securitas Guarding Services (Singapore) Pte Ltd | East | Data Centre | SO | SO | Hougang |
| TwinRock Global | Central | Gov Building | SO | SO | Yishun |
| Soverus Pte Ltd | North | Industrial / Factory | SO | SO | Yishun |
| Inhouse Employer | Central | Hotel | OM | SO | Hougang |
| Inhouse Employer | North | In-House | SO | SO | Yishun |
| Reachfield Security & Safety Management Pte Ltd | North | School | SO | SO | Yishun |
| Inhouse Employer | North | In-House | SO | SO | - |
| Inhouse Employer | North | In-House | SO | SO | Yishun |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SO | Bedok |
| Overseas (Singapore) Security & Private Investigation Consultants Pte Ltd | Island Wide | - | OE | SO | Woodlands |
| Peregrine Security Pte. Ltd. | Island Wide | - | OE | SO | Woodlands |
| G4S Secure Solutions (Singapore) Pte Ltd | West | School | SO | SO | Tampines West |
| Royal Security Management Services Pte Ltd | West | Construction | SO | SO | Choa Chu Kang |
| Titanium Safety & Security Pte Ltd | North | In-House | SSO | SO | Bukit Batok |
| Certis Group | Central | Commercial | SO | SO | Bukit Batok |
| G4S Secure Solutions (Singapore) Pte Ltd | South | - | SO | SO | Bukit Batok |
| Pedro Investigations & Security Services Pte. Ltd. | Central | - | SSO | SO | Bukit Batok |
| Ranger Investigation & Security Services Pte Ltd | East | In-House | SSO | SO | Bukit Batok |
| Union Security Services Pte. Ltd. | Island Wide | - | SSO | SO | Bukit Batok |
