| ProtectPlus Pte Ltd | Island Wide | - | OE | CSO | Pasir Ris |
| Guthrie FMC Security Pte Ltd | Island Wide | - | OE | CSO | Pasir Ris |
| Kingston Property Maintenance Services Pte Ltd | Island Wide | - | OE | CSO | Pasir Ris |
| Total Protection Solutions Pte Ltd | Island Wide | - | OM | CSO | Pasir Ris |
| Union Security Services Pte. Ltd. | Island Wide | - | OE | CSO | Pasir Ris |
| Certis Group | Island Wide | - | SSO | SSO | Choa Chu Kang |
| SATS Ltd | Island Wide | - | OM | CSO | Choa Chu Kang |
| Certis Group | Island Wide | - | SSO | SSO | Choa Chu Kang |
| Trek Investigations & Security Management Services Pte Ltd | Central | - | SO | SSO | Yishun |
| 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 |
| TwinRock Global | Central | - | Security Mgt | SSS | Tiong Bahru |
| Star Security Services | Island Wide | - | Security Mgt | SSS | Tiong Bahru |
| Peregrine Security Pte. Ltd. | Central | - | SSO | SS | Geylang 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 |
