| Certis Group | Island Wide | - | SSO | SSO | Marsiling |
| Inhouse Employer | North | Industrial / Factory | SSO | SO | Sembawang |
| Inhouse Employer | North | Industrial / Factory | SSO | SSO | Yishun |
| Inhouse Employer | North | Industrial / Factory | SSO | SSO | Marsiling |
| Inhouse Employer | North | Industrial / Factory | SSO | CSO | Bukit Panjang |
| Triple ‘S’ Protection Pte Ltd | Central | Depot | SSO | SO | Hougang |
| Tiger Hong Security Services & Consultants Pte Ltd | West | Condominium | SSO | SO | Tuas Link |
| Inhouse Employer | North | Industrial / Factory | SSO | SSO | Yishun |
| Prosegur Singapore Pte Ltd | East | Industrial / Factory | SSO | SO | Sengkang |
| GoMobile Security Solutions Pte Ltd | West | Industrial / Factory | SSO | SO | Choa Chu Kang |
| Inhouse Employer | North | Industrial / Factory | SSO | SSO | Yishun |
| Kingston Property Maintenance Services Pte Ltd | Central | Condominium | SSO | SSO | - |
| Unique Security Services Pte Ltd | Central | Condominium | SSO | SS | Toa Payoh |
| Premier Security Co-operative Ltd | Central | Healthcare | SSO | SS | Toa Payoh |
| Chang & Chang Security Management Pte. Ltd. | Central | Condominium | SSO | SS | Toa Payoh |
| Focus Security Services Pte Ltd | West | Industrial / Factory | SSO | SSO | Jurong East |
| Securitas Guarding Services (Singapore) Pte Ltd | West | Data Centre | SSO | CSO | Boon Lay |
| Inhouse Employer | North | Industrial / Factory | SSO | CSO | Marsiling |
| SMS Security | East | Mix-Development | SSO | SSS | Aljunied |
| Security Masters Pte Ltd | Island Wide | - | SS | SS | Sengkang |
| Primesafe Security & Investigation Pte Ltd | South | Commercial | SS | SSS | Geylang Bahru |
| Union Security Services Pte. Ltd. | East | Data Centre | SS | SSS | Tampines |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | - | SS | SS | Marsiling |
| Primesafe Security & Investigation Pte Ltd | Island Wide | Commercial | SS | SS | Lavender |
| Primesafe Security & Investigation Pte Ltd | Island Wide | - | SS | SS | Lavender |
