| Trek Investigations & Security Management Services Pte Ltd | Island Wide | - | OE | SSS | Bukit Batok |
| Securus Pte Ltd | Island Wide | - | OE | SSO | Hougang |
| Aero Asia Security Systems Pte Ltd | Island Wide | - | OE | SSO | Hougang |
| Star Security Services | Island Wide | - | Security Mgt | SS | Kranji |
| Titanium Safety & Security Pte Ltd | Island Wide | - | OE | SSO | Hougang |
| GoMobile Security Solutions Pte Ltd | Island Wide | - | OM | SO | Bedok North |
| Acestes Pte Ltd | Central | - | Security Mgt | SS | Sengkang |
| Star Security Services | Island Wide | - | Security Mgt | SS | Sengkang |
| Eagle I Security Services Pte Ltd | Island Wide | - | OE | SS | Sengkang |
| FormTeam Consultancy Pte Ltd | Island Wide | - | OE | SS | Sengkang |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SS | Sengkang |
| Titanium Safety & Security Pte Ltd | Island Wide | - | OE | SS | Sengkang |
| Guthrie FMC Security Pte Ltd | Island Wide | - | OE | SSO | Hougang |
| Inhouse Employer | Island Wide | - | OE | SSO | Hougang |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| Shine Security Agency Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| Strive Security Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| Ademco Security Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| Securus Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| PICO Guards Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| G4S Secure Solutions (Singapore) Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| King's Security and Safety Management Pte Ltd | Island Wide | - | Sec Tech / Eng | SO | Dover |
| Peregrine Security Pte. Ltd. | Island Wide | - | OE | SSO | Simei |
| SATS Ltd | East | - | OE | SSO | Simei |
| Acestes Pte Ltd | Island Wide | - | OM | CSO | Tampines |
