| AGS Integration Pte. Ltd. | West | In-House | SS | SS | Woodlands |
| Securus Pte Ltd | Island Wide | Commercial | OE | SS | Marsiling |
| FormTeam Consultancy Pte Ltd | Island Wide | - | OE | SS | Ang Mo Kio |
| Titanium Safety & Security Pte Ltd | Island Wide | - | OE | SS | Tampines |
| Fervour Pte Ltd | Island Wide | - | OM | SS | Dover |
| Primesafe Security & Investigation Pte Ltd | Island Wide | Commercial | SS | SS | Lavender |
| SATS Ltd | Island Wide | Commercial | SO | SO | Bukit Batok |
| SATS Ltd | Island Wide | - | OM | SS | Tampines |
| Peregrine Security Pte. Ltd. | Island Wide | - | OE | SS | Clementi |
| Inhouse Employer | East | In-House | SO | SSO | - |
| TwinRock Global | Central | - | Security Mgt | SSS | Tiong Bahru |
| Acestes Pte Ltd | Island Wide | - | OM | SSS | Tampines |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| Ranger Investigation & Security Services Pte Ltd | East | In-House | SSO | SSO | Boon Lay |
| Acestes Pte Ltd | Island Wide | - | OM | Nil | Telok Blangah |
| Certis Group | South | Healthcare | SS | SS | Ang Mo Kio |
| RAS Security Pte Ltd | North | Commercial | SSO | SO | Bukit Batok |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| Inhouse Employer | North | In-House | SO | SO | - |
| Overseas (Singapore) Security & Private Investigation Consultants Pte Ltd | Island Wide | - | OE | Nil | Bukit Batok |
| Securus Pte Ltd | Island Wide | - | OE | SSS | Boon Lay |
| Acestes Pte Ltd | Island Wide | - | OM | SS | Punggol |
| GoMobile Security Solutions Pte Ltd | Island Wide | - | OM | SSS | Yishun |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SO | SSO | Pasir Ris |
| Royal Security Management Services Pte Ltd | East | Gov Building | SO | SO | Simei |
