| SMS Investigation & Security Pte Ltd | Central | - | OM | SS | Hougang |
| York Hotel (Private) Limited | Central | In-House | OM | SS | Hougang |
| SATS Ltd | East | - | OE | SS | Hougang |
| TwinRock Global | Central | - | OE | SS | Hougang |
| York Hotel (Private) Limited | Central | In-House | OM | SS | Hougang |
| SATS Ltd | East | - | OE | SS | Hougang |
| Metropolis Security Systems Pte Ltd | Island Wide | - | OE | SS | Hougang |
| Guthrie FMC Security Pte Ltd | Island Wide | - | OE | SS | Hougang |
| Crowne Plaza Changi Airport | East | In-House | OE | SS | Hougang |
| Soverus Pte Ltd | Island Wide | - | OE | SS | Hougang |
| AGS Integration Pte. Ltd. | Island Wide | - | OE | SS | Hougang |
| Soverus Pte Ltd | Island Wide | - | OE | SS | Hougang |
| Inhouse Employer | Central | Country Club | OM | SSO | Hougang |
| Security Masters Pte Ltd | Central | Data Centre | SS | SS | Hougang |
| PICO Guards Pte Ltd | North | Data Centre | SS | SS | Hougang |
| Prosec Services Pte Ltd | East | Data Centre | SSS | SS | Hougang |
| SMS Investigation & Security Pte Ltd | Central | Condominium | SS | SS | Hougang |
| Inhouse Employer | West | In-House | OM | SS | Hougang |
| SATS Ltd | Island Wide | - | OM | SS | Hougang |
| Union Security Services Pte. Ltd. | Island Wide | - | OE | SS | Hougang |
| SMS Investigation & Security Pte Ltd | Central | - | OM | SS | Hougang |
| Orchid Hotel Private Limited | Central | In-House | OM | SS | Hougang |
| SATS Ltd | Island Wide | - | OM | SS | Hougang |
| York Hotel (Private) Limited | Central | In-House | OM | SS | Hougang |
| Securus Pte Ltd | Island Wide | - | OM | SS | Hougang |
