| 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 |
| Security & Risk Solutions Pte. Ltd. | Island Wide | - | OE | SSO | Hougang |
| Global Ritz Protection (Security Services) Pte Ltd | Island Wide | - | OE | SSO | Hougang |
| Aero Asia Security Systems Pte Ltd | Island Wide | - | OE | SSO | Hougang |
| Titanium Safety & Security Pte Ltd | Island Wide | - | OE | SSO | Hougang |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | Commercial | OE | CSO | Bedok |
| Acestes Pte Ltd | Island Wide | - | OM | SSS | Bedok |
| FormTeam Consultancy Pte Ltd | Island Wide | - | OE | SSS | Clementi |
| Securus Pte Ltd | Island Wide | - | OE | SSS | Clementi |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SSS | Clementi |
| Legion Protection Pte Ltd | Island Wide | - | OE | SSS | Clementi |
| ProtectPlus Pte Ltd | Island Wide | - | OE | SSS | Clementi |
| Peregrine Security Pte. Ltd. | Island Wide | - | OE | SSS | Clementi |
| Aigle Security Pte Ltd | Island Wide | - | OE | SSS | Clementi |
| Global Ritz Protection (Security Services) Pte Ltd | Island Wide | - | OE | SSS | Clementi |
| Soverus Pte Ltd | Island Wide | - | SSS | SS | Bukit Panjang |
