| Certis Group | Island Wide | - | SSO | SSO | Choa Chu Kang |
| AETOS Holdings Pte Ltd | Island Wide | Mix-Development | APO | SO | Tampines |
| Acestes Pte Ltd | Island Wide | - | OM | CSO | Toa Payoh |
| Securus Pte Ltd | Island Wide | - | OE | SSS | Yishun |
| ProtectPlus Pte Ltd | Island Wide | - | OE | SO | Marsiling |
| Certis Group | Island Wide | - | SSO | SSO | Choa Chu Kang |
| Certis Group | Island Wide | - | SSO | SSO | Choa Chu Kang |
| Certis Group | Island Wide | - | SSO | SSO | Choa Chu Kang |
| Certis Group | Island Wide | - | SSO | SSO | Choa Chu Kang |
| Star Security Services | Island Wide | - | Security Mgt | SSS | Tiong Bahru |
| Ademco Security Pte Ltd | Island Wide | - | OE | SS | Geylang Bahru |
| Strive Security Pte Ltd | Island Wide | - | OE | SS | Geylang Bahru |
| Uniforce Security Services Pte Ltd | Island Wide | - | OE | SS | Geylang Bahru |
| SATS Ltd | Island Wide | - | OM | Nil | Tampines |
| Soverus Pte Ltd | Island Wide | - | SSO | SSO | Choa Chu Kang |
| Star Security Services | Island Wide | - | Security Mgt | SSO | Hougang |
| Star Security Services | Island Wide | - | Security Mgt | SSO | Hougang |
| SATS Ltd | Island Wide | - | Inves | SO | Hougang |
| Certis Group | Island Wide | - | SSO | SSO | Choa Chu Kang |
| Fervour Pte Ltd | Island Wide | - | OM | CSO | Toa Payoh |
| SATS Ltd | Island Wide | - | OM | CSO | Toa Payoh |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OM | CSO | Toa Payoh |
| Acestes Pte Ltd | Island Wide | - | OM | CSO | Toa Payoh |
| Metropolis Security Systems Pte Ltd | Island Wide | - | OE | SS | Bukit Batok |
| Star Security Services | Island Wide | - | Security Mgt | SS | Bukit Batok |
