| Ranger Investigation & Security Services Pte Ltd | East | Industrial / Factory | SO | SO | Hougang |
| AGS Integration Pte. Ltd. | Island Wide | - | OE | CSO | Marsiling |
| Star Security Services | Island Wide | - | OE | SS | Woodlands |
| Regal Security & Fire Management Services Pte Ltd | West | Industrial / Factory | SO | SO | Choa Chu Kang |
| Metropolis Security Systems Pte Ltd | East | Gov Building | SSO | SS | Aljunied |
| Inhouse Employer | East | School | SO | SO | Bedok |
| Inhouse Employer | West | Industrial / Factory | SO | SSS | Yishun |
| Soverus Pte Ltd | South | Commercial | SS | SS | - |
| Inhouse Employer | North | Industrial / Factory | SSO | SO | Bukit Panjang |
| Crowne Plaza Changi Airport | East | In-House | OE | SO | Hougang |
| Focal Investigation & Security Agency Pte Ltd | South | Commercial | SO | SO | Tampines |
| Primesafe Security & Investigation Pte Ltd | Island Wide | - | SS | CSO | Bedok |
| Inhouse Employer | East | In-House | SO | SSO | - |
| Force-One Security | North | Data Centre | SO | SSO | Marsiling |
| PICO Guards Pte Ltd | Island Wide | - | OM | SSS | Pioneer |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | CSO | Toa Payoh |
| RAS Security Pte Ltd | North | In-House | Office Team | SO | Bedok |
| Reachfield Security & Safety Management Pte Ltd | Central | School | Security Mgt | SSO | Marsiling |
| G4S Secure Solutions (Singapore) Pte Ltd | East | In-House | SSO | SSO | Bukit Batok |
| Overseas (Singapore) Security & Private Investigation Consultants Pte Ltd | Island Wide | - | OE | SSS | Yishun |
| Inhouse Employer | East | School | SO | SO | Bedok |
| Inhouse Employer | West | Industrial / Factory | SO | SS | Jalan Besar |
| Prospect Protection Pte Ltd | West | Industrial / Factory | SSO | SS | Yishun |
| Soverus Pte Ltd | Island Wide | - | SSS | SSS | Dover |
| Inhouse Employer | West | In-House | OM | SSS | Sengkang |
