| Reachfield Security & Safety Management Pte Ltd | Island Wide | Commercial | OE | CSO | Bedok |
| SATS Ltd | Island Wide | - | OM | SSS | Tampines |
| Ademco Security Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| RAS Security Pte Ltd | East | Commercial | SO | SO | Tampines |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OM | SS | Punggol |
| Security Masters Pte Ltd | North | Commercial | CSO | CSO | Bedok |
| Grand Copthorne Waterfront Hotel | Central | In-House | Security Mgt | SSO | MacPherson |
| Regal Security & Fire Management Services Pte Ltd | Central | - | OE | CSO | Pasir Ris |
| Inhouse Employer | Central | In-House | SSS | SSS | Tanjong Pagar |
| Security & Risk Solutions Pte. Ltd. | Central | In-House | RSOC/CAMS Op | SSO | Sengkang |
| Resorts World Sentosa | South | Commercial | SO | Nil | Jurong East |
| Trek Investigations & Security Management Services Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| G4S Secure Solutions (Singapore) Pte Ltd | East | In-House | SSO | SSO | - |
| Horus I (Private Limited) | Central | Retail | SO | SSO | Pasir Ris |
| Dragnet Smartech Security Pte Ltd | Island Wide | - | SS | SS | Sengkang |
| GoMobile Security Solutions Pte Ltd | Island Wide | - | OM | Nil | Yishun |
| Premier Security Co-operative Ltd | North | School | SSS | SSS | Ang Mo Kio |
| Soverus Pte Ltd | Island Wide | - | SSS | SSS | Sengkang |
| Triple ‘S’ Protection Pte Ltd | East | Commercial | SS | SS | Hougang |
| Artyzen Singapore | Central | Hotel | SS | SS | Sengkang |
| Ascentiaa Security Management Pte Ltd | Island Wide | - | OE | SS | Choa Chu Kang |
| Force-One Security | Central | Commercial | SO | SSO | Pasir Ris |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SS | Dover |
| Acestes Pte Ltd | Island Wide | - | OM | SSS | Choa Chu Kang |
| Union Security Services Pte. Ltd. | North | Commercial | SSO | SS | Woodlands |
