| G4S Secure Solutions (Singapore) Pte Ltd | North | School | SO | SSO | Ang Mo Kio |
| Excellent Security & Safety Pte Ltd | North | Data Centre | SO | SSO | Ang Mo Kio |
| Eagle I Security Services Pte Ltd | Central | Healthcare | SO | SO | Woodlands |
| Elitez Security Pte Ltd | Central | Commercial | SO | SO | Woodlands |
| Reachfield Security & Safety Management Pte Ltd | North | School | SO | SO | Woodlands |
| Reachfield Security & Safety Management Pte Ltd | North | School | SO | SO | Woodlands |
| Force-One Security | North | Data Centre | SO | SO | Yishun |
| Reachfield Security & Safety Management Pte Ltd | North | School | SO | SO | Woodlands |
| Triple ‘S’ Protection Pte Ltd | Island Wide | Commercial | SO | SSS | Bukit Batok |
| Ranger Investigation & Security Services Pte Ltd | West | Construction | SO | SSS | Bukit Batok |
| PICO Guards Pte Ltd | East | Commercial | SO | SO | Hougang |
| Certis Group | Central | Commercial | SO | CSO | Bedok |
| GATES PCM Integrated Services Pte Ltd | East | Commercial | SO | CSO | Bedok |
| SMS Security | Central | Industrial / Factory | SO | SSO | Tanjong Pagar |
| SMS Security | East | Retail / Mall | SO | SO | Eunos |
| Young Women's Christian Association of Singapore | Central | In-House | SO | SS | Aljunied |
| Metropolis Security Systems Pte Ltd | East | Condominium | SO | SO | Sengkang |
| SMS Security | East | Retail / Mall | SO | SO | Eunos |
| Union Security Services Pte Ltd | North | Healthcare | SO | SS | Woodlands South |
| Securitas Guarding Services (Singapore) Pte Ltd | East | Data Centre | SO | SO | Hougang |
| Union Security Services Pte Ltd | North | Healthcare | SO | SS | Woodlands South |
| Certis Group | Central | Commercial | SO | CSO | Bedok |
| Certis Group | Central | Commercial | SO | CSO | Bedok |
| GATES PCM Integrated Services Pte Ltd | East | Commercial | SO | CSO | Bedok |
| Eagle I Security Services Pte Ltd | East | - | SO | CSO | Bedok |
