| Trek Investigations & Security Management Services Pte Ltd | Island Wide | - | OE | SS | Sengkang |
| TwinRock Global | Central | - | Security Mgt | CSO | Marsiling |
| PICO Guards Pte Ltd | Island Wide | - | OM | SSS | Tampines |
| Premier Security Co-operative Ltd | Central | Healthcare | SSS | CSO | Toa Payoh |
| Trek Investigations & Security Management Services Pte Ltd | Central | Commercial | SO | CSO | Ang Mo Kio |
| Guthrie FMC Security Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| ProtectPlus Pte Ltd | Island Wide | - | OE | SO | Marsiling |
| Total Protection Solutions Pte Ltd | Island Wide | - | OM | SS | Choa Chu Kang |
| Fervour Pte Ltd | Island Wide | - | OM | SS | Bukit Panjang |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | CSO | Toa Payoh |
| Security Masters Pte Ltd | North | Commercial | CSO | CSO | Woodlands |
| Uniforce Security Services Pte Ltd | Island Wide | - | OE | SSO | Sembawang |
| Inhouse Employer | East | School | SO | SSS | Marsiling |
| Reachfield Security & Safety Management Pte Ltd | East | Industrial / Factory | SO | SO | Bedok |
| Prosec Services Pte Ltd | East | - | SSO | SSO | Tampines |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | Commercial | SS | SO | Yishun |
| PICO Guards Pte Ltd | Island Wide | - | OM | SSS | Yishun |
| Soverus Pte Ltd | North | School | SO | SO | Punggol |
| G4S Secure Solutions (Singapore) Pte Ltd | West | School | SO | SO | - |
| Fervour Pte Ltd | North | Healthcare | SSO | SSO | Admiralty |
| Trek Investigations & Security Management Services Pte Ltd | Island Wide | - | OE | CSO | Bedok |
| SATS Ltd | Island Wide | - | OM | CSO | Bukit Batok |
| York Hotel (Private) Limited | Central | In-House | OM | SO | Yishun |
| Inhouse Employer | Island Wide | Construction | OM | SS | Choa Chu Kang |
| Inhouse Employer | Central | In-House | SO | SSS | MacPherson |
