| Premier Security Co-operative Ltd | East | Commercial | SO | SO | Simei |
| Octopus Distribution Networks Pte Ltd | East | In-House | SO | SO | Simei |
| Royal Security Management Services Pte Ltd | East | Gov Building | SO | SO | Simei |
| Premier Security Co-operative Ltd | East | Commercial | SO | SO | Simei |
| Jasa Investigation & Security Services Pte Ltd | East | Healthcare | SO | SO | Punggol |
| RAS Security Pte Ltd | Island Wide | Commercial | SSO | SO | Punggol |
| Iconic Locations S Pte Ltd | Central | In-House | SO | SO | Pasir Ris |
| Inhouse Employer | East | School | SO | SO | Pasir Ris |
| Supreme Security Agency Pte. Ltd. | West | Industrial / Factory | SO | SO | Woodlands |
| Soverus Pte Ltd | North | Industrial / Factory | SO | SO | Woodlands |
| G4S Secure Solutions (Singapore) Pte Ltd | South | - | SO | SO | Punggol |
| GATES PCM Integrated Services Pte Ltd | Central | Commercial | SO | SO | Novena |
| Fervour Pte Ltd | Central | Data Centre | SO | SO | Novena |
| GATES PCM Integrated Services Pte Ltd | Central | Commercial | SO | SO | Novena |
| Trek Investigations & Security Management Services Pte Ltd | Central | Condominium | SO | SO | Novena |
| Acestes Pte Ltd | Central | - | Security Mgt | SO | Choa Chu Kang |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SO | Choa Chu Kang |
| Reachfield Security & Safety Management Pte Ltd | East | School | SO | SO | Punggol |
| RAS Security Pte Ltd | North | Commercial | SSO | SO | Clementi |
| SATS Ltd | Island Wide | - | OM | SO | Hougang |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SO | SO | Tuas Link |
| Acestes Pte Ltd | Island Wide | - | OM | SO | Tampines East |
| Fervour Pte Ltd | Island Wide | - | OM | SO | Tampines East |
| Fervour Pte Ltd | Central | Data Centre | SO | SO | Hougang |
| Inhouse Employer | East | School | SO | SO | Serangoon |
