| Crowne Plaza Changi Airport | East | Hotel | Security Mgt | SS | Tampines |
| SECOM Singapore Pte Ltd | Island Wide | - | OE | SS | Sengkang |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SS | Sengkang |
| Peregrine Security Pte. Ltd. | Island Wide | - | OE | SS | Sengkang |
| Stalwart Security Pte Ltd | Island Wide | - | OE | SS | Sengkang |
| Titanium Safety & Security Pte Ltd | North | In-House | OE | SS | Sengkang |
| Eagle I Security Services Pte Ltd | Island Wide | - | OE | SS | Sengkang |
| Soverus Pte Ltd | Island Wide | - | OE | SS | Sengkang |
| Aigle Security Pte Ltd | Island Wide | - | OE | SS | Sengkang |
| Dragnet Smartech Security Pte Ltd | Island Wide | - | SS | SS | Sengkang |
| Soverus Pte Ltd | South | In-House | SS | SS | Sengkang |
| Eagle I Security Services Pte Ltd | Island Wide | - | SS | SS | Sengkang |
| Security Masters Pte Ltd | Island Wide | - | SS | SS | Sengkang |
| Union Security Services Pte. Ltd. | East | Data Centre | SS | SS | Sengkang |
| York Hotel (Private) Limited | Central | In-House | SS | SS | Sengkang |
| Security Masters Pte Ltd | Island Wide | - | SS | SS | Sengkang |
| Inhouse Employer | West | School | OE | SS | Jurong East |
| SATS Ltd | Island Wide | - | OM | SS | Tampines |
| Reachfield Security & Safety Management Pte Ltd | West | Industrial / Factory | SS | SS | Lakeside |
| Triple ‘S’ Protection Pte Ltd | West | Commercial | SS | SS | Lakeside |
| Security Masters Pte Ltd | Island Wide | - | SS | SS | Jurong East |
| Union Security Services Pte. Ltd. | North | Commercial | SS | SS | Hougang |
| Security Masters Pte Ltd | Island Wide | - | SS | SS | Hougang |
| Triple ‘S’ Protection Pte Ltd | East | Commercial | SS | SS | Hougang |
| SMS Investigation & Security Pte Ltd | Central | Condominium | SS | SS | Hougang |
