| Force-One Security | Central | Commercial | SO | SO | Yishun |
| Force-One Security | North | Data Centre | OE | SO | Tampines |
| Ademco Security Pte Ltd | West | Industrial / Factory | SSO | SO | Jurong East |
| Certis Group | West | School | SSO | SO | Outram Park |
| G4S Secure Solutions (Singapore) Pte Ltd | Central | Commercial | SSO | SO | Outram Park |
| Inhouse Employer | East | In-House | SO | SO | Woodleigh |
| Inhouse Employer | East | In-House | SO | SO | Woodleigh |
| Elid Technology International Pte Ltd | North | Condominium | SO | SO | Sengkang |
| GATES PCM Integrated Services Pte Ltd | East | Condominium | SO | SO | Sengkang |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | - | Security Mgt | SO | Tampines East |
| Force-One Security | North | Data Centre | SO | SO | Hougang |
| Aigle Security Pte Ltd | Central | Commercial | SO | SO | Punggol |
| Aigle Security Pte Ltd | East | Commercial | SO | SO | Punggol |
| First Security & Private Investigation (Singapore) Pte Ltd | South | Condominium | SO | SO | Punggol |
| Uniforce Security Services Pte Ltd | Island Wide | - | OE | SO | Mountbatten |
| SMS Investigation & Security Pte Ltd | Central | Condominium | SO | SO | Sengkang |
| Elid Technology International Pte Ltd | North | Condominium | SO | SO | Sengkang |
| Inhouse Employer | East | In-House | SO | SO | Punggol |
| Union Security Services Pte. Ltd. | East | Data Centre | SS | SO | Eunos |
| Metropolis Security Systems Pte Ltd | Central | Condominium | SO | SO | Mountbatten |
| Elid Technology International Pte Ltd | East | Condominium | SO | SO | Mountbatten |
| Elid Technology International Pte Ltd | East | Condominium | SO | SO | Mountbatten |
| TwinRock Global | East | Condominium | SO | SO | Mountbatten |
| GATES PCM Integrated Services Pte Ltd | Central | Commercial | SO | SO | Mountbatten |
| William Secure Solutions Pte Ltd | South | Condominium | SO | SO | Mountbatten |
