| Elid Technology International Pte Ltd | Island Wide | - | SSO | SSO | Punggol |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SS | Ang Mo Kio |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | Commercial | OE | CSO | Bedok |
| TwinRock Global | North | Condominium | SO | SSO | Yishun |
| Orchid Hotel Private Limited | Central | In-House | OM | SSS | Yishun |
| York Hotel (Private) Limited | Central | In-House | OM | SS | Sengkang |
| Force-One Security | North | Data Centre | SO | SO | Serangoon |
| GATES PCM Integrated Services Pte Ltd | East | Commercial | SO | CSO | Bedok |
| Guthrie FMC Security Pte Ltd | Island Wide | - | OE | SS | Yishun |
| Ademco Security Pte Ltd | West | Industrial / Factory | SSO | SO | Lakeside |
| Metropolis Security Systems Pte Ltd | North | - | SO | SSO | Sengkang |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| Prosegur Singapore Pte Ltd | East | Industrial / Factory | SSO | SO | Sengkang |
| G4S Secure Solutions (Singapore) Pte Ltd | North | School | SO | SO | Bras Basah |
| Soverus Pte Ltd | Island Wide | - | SSS | CSO | Pasir Ris |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| G4S Secure Solutions (Singapore) Pte Ltd | East | In-House | SSO | CSO | Bedok |
| Total Protection Solutions Pte Ltd | Island Wide | - | OM | CSO | Pasir Ris |
| Inhouse Employer | West | In-House | OM | SSS | Yishun |
| AGS Integration Pte. Ltd. | Island Wide | - | OE | SS | Woodlands |
| Peregrine Security Pte. Ltd. | Island Wide | - | OE | CSO | Marsiling |
| RAS Security Pte Ltd | North | Commercial | SSO | SSO | Tiong Bahru |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OM | CSO | Toa Payoh |
| Union Security Services Pte. Ltd. | Island Wide | - | SSO | SO | Bukit Batok |
| Reachfield Security & Safety Management Pte Ltd | East | School | SO | SO | Mountbatten |
