| GoMobile Security Solutions Pte Ltd | North | Condominium | SO | SO | Hougang |
| GATES PCM Integrated Services Pte Ltd | East | Condominium | SO | SO | Hougang |
| Aspectus Consultancy Pte Ltd | Central | Condominium | SO | SO | Hougang |
| Union Security Services Pte. Ltd. | North | Commercial | SO | SO | Hougang |
| Peregrine Security Pte. Ltd. | North | Healthcare | SO | SO | Ang Mo Kio |
| G4S Secure Solutions (Singapore) Pte Ltd | North | School | SO | SO | Ang Mo Kio |
| Union Security Services Pte. Ltd. | North | Commercial | SO | SO | Ang Mo Kio |
| Soverus Pte Ltd | North | School | SO | SO | Ang Mo Kio |
| Union Security Services Pte. Ltd. | North | Commercial | SO | SO | Ang Mo Kio |
| SECOM Singapore Pte Ltd | Island Wide | - | OE | SO | Bukit Batok |
| Resorts World Sentosa | South | Commercial | SO | SO | Bukit Batok |
| Certis Group | Central | Commercial | SO | SO | Bukit Batok |
| Eagle I Security Services Pte Ltd | Island Wide | - | OE | SO | Woodlands |
| Resorts World Sentosa | South | Commercial | SO | SO | Sengkang |
| Bulls-Eye Security Services Pte Ltd | South | Gov Building | SO | SO | Hougang |
| SATS Ltd | Island Wide | Commercial | SO | SO | Hougang |
| Jasa Investigation & Security Services Pte Ltd | East | Industrial / Factory | SO | SO | Hougang |
| Ranger Investigation & Security Services Pte Ltd | East | Industrial / Factory | SO | SO | Hougang |
| Regal Security & Fire Management Services Pte Ltd | Central | Commercial | SO | SO | Hougang |
| Horus I (Private Limited) | Central | Retail | SO | SO | Tai Seng |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | Commercial | SO | SO | Tai Seng |
| Inhouse Employer | North | Commercial | SO | SO | Choa Chu Kang |
| Union Security Services Pte. Ltd. | East | Data Centre | SO | SO | Tampines East |
| Union Security Services Pte. Ltd. | East | Data Centre | SO | SO | Tampines East |
| Security Enforcer Pte Ltd | Central | Hotel | SO | SO | Hougang |
