| Legion Protection Pte Ltd | Island Wide | - | OE | SSS | Tampines West |
| Trek Investigations & Security Management Services Pte Ltd | Central | Commercial | SO | CSO | Ang Mo Kio |
| Inhouse Employer | Island Wide | Construction | OM | SS | Tampines |
| A-SAT Pte Ltd | North | Commercial | SSO | SS | Woodlands |
| PICO Guards Pte Ltd | South | Commercial | SSS | CSO | Marsiling |
| Triple ‘S’ Protection Pte Ltd | Island Wide | Commercial | SO | SO | Pioneer |
| Force-One Security | North | Data Centre | SO | SO | Serangoon |
| Premier Security Co-operative Ltd | East | In-House | Office Team | SSS | Sengkang |
| AGS Integration Pte. Ltd. | Central | Commercial | SO | CSO | Ang Mo Kio |
| SMS Security | East | Commercial | SSO | SS | Simei |
| Crowne Plaza Changi Airport | East | In-House | OE | SS | Hougang |
| Jasa Investigation & Security Services Pte Ltd | East | Condominium | SO | SO | Tampines |
| Kingston Property Maintenance Services Pte Ltd | Central | Mix-Development | SS | SSO | Admiralty |
| SATS Ltd | Island Wide | - | OM | SSS | Woodlands |
| Inhouse Employer | East | In-House | SO | SO | Woodleigh |
| Reachfield Security & Safety Management Pte Ltd | South | - | OE | SSO | Simei |
| Reachfield Security & Safety Management Pte Ltd | North | School | SSS | SSS | Pasir Ris |
| Trek Investigations & Security Management Services Pte Ltd | Island Wide | - | OE | CSO | Sengkang |
| Securus Pte Ltd | Island Wide | - | OM | SSS | Sengkang |
| Force-One Security | Central | Commercial | SO | SO | Bukit Batok |
| Fervour Pte Ltd | Island Wide | - | OM | CSO | Toa Payoh |
| Soverus Pte Ltd | Central | Data Centre | SSS | CSO | Clementi |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SSO | Punggol |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SS | Bukit Batok |
| Overseas (Singapore) Security & Private Investigation Consultants Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
