| Ademco Security Pte Ltd | Island Wide | - | OE | SSS | Bukit Panjang |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | Mix-Development | SSO | SSO | Bedok North |
| Ademco Security Pte Ltd | Island Wide | - | SSO | SSO | Bedok North |
| Legion Protection Pte Ltd | Island Wide | - | OE | SSS | Bukit Panjang |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OE | SSS | Bukit Panjang |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | Commercial | OE | CSO | Bedok |
| ProtectPlus Pte Ltd | Island Wide | - | OE | SSS | Clementi |
| Securus Pte Ltd | Island Wide | - | OM | SS | Woodlands |
| SATS Ltd | Island Wide | - | OM | SS | Woodlands |
| Aigle Security Pte Ltd | Island Wide | - | OE | SSS | Bukit Panjang |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SS | Bukit Panjang |
| Securus Pte Ltd | Island Wide | Commercial | OE | SS | Admiralty |
| Aigle Security Pte Ltd | Island Wide | - | OE | SS | Admiralty |
| FormTeam Consultancy Pte Ltd | Island Wide | - | OE | SS | Admiralty |
| PICO Guards Pte Ltd | Island Wide | - | OE | SS | - |
| AGS Integration Pte. Ltd. | Island Wide | - | OE | SS | - |
| Ranger Investigation & Security Services Pte Ltd | Island Wide | In-House | OE | SS | - |
| Legion Protection Pte Ltd | Island Wide | - | OE | SS | - |
| PICO Guards Pte Ltd | Island Wide | - | OE | SS | - |
| Ademco Security Pte Ltd | Island Wide | - | SSO | SS | Ang Mo Kio |
| Apro Asian Protection Pte Ltd | Island Wide | - | OM | SSS | Woodlands |
| SATS Ltd | Island Wide | - | OM | SS | Tampines |
| Apro Asian Protection Pte Ltd | Island Wide | - | OM | SS | Tampines |
| SATS Ltd | Island Wide | - | OM | Nil | Tampines |
| Inhouse Employer | Island Wide | Construction | OM | SSO | Hougang |
