| Inhouse Employer | Central | In-House | SO | SO | Punggol |
| Premier Security Co-operative Ltd | Central | Healthcare | SSS | CSO | Toa Payoh |
| Strive Security Pte Ltd | Island Wide | - | OE | SS | Geylang Bahru |
| G4S Secure Solutions (Singapore) Pte Ltd | East | In-House | SSO | SS | Bukit Panjang |
| Metropolis Security Systems Pte Ltd | Island Wide | - | OE | SSO | Boon Lay |
| Uniforce Security Services Pte Ltd | Central | Condominium | SS | SS | - |
| Eagle I Security Services Pte Ltd | North | Condominium | SS | SS | - |
| Jasa Investigation & Security Services Pte Ltd | West | Industrial / Factory | SSO | SSO | - |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SSO | Pasir Ris |
| PICO Guards Pte Ltd | North | Industrial / Factory | SSO | SS | Woodlands |
| Soverus Pte Ltd | Island Wide | - | SSS | CSO | Marsiling |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | Commercial | SS | SO | Marsiling |
| Aspectus Consultancy Pte Ltd | Central | Mix-Development | SO | SSO | Sengkang |
| Guthrie FMC Security Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| Danmax Security Management Pte Ltd | East | Industrial / Factory | SSO | SO | Tampines |
| Inhouse Employer | Central | Mix-Development | Security Mgt | CSO | Boon Lay |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | Commercial | SS | SS | Yishun |
| RAS Security Pte Ltd | North | Commercial | OE | CSO | Ang Mo Kio |
| TwinRock Global | Central | - | Security Mgt | CSO | Marsiling |
| RAS Security Pte Ltd | Island Wide | Commercial | SSO | SO | Punggol |
| Pan Pacific Singapore | South | In-House | Security Mgt | SSS | Yishun |
| Inhouse Employer | Central | Country Club | OM | CSO | Bukit Batok |
| Soverus Pte Ltd | West | Industrial / Factory | SO | SO | Bukit Gombak |
| Force-One Security | Central | Commercial | SO | SO | Bukit Batok |
| Union Security Services Pte. Ltd. | East | Data Centre | SO | SO | Tampines |
