| Titanium Safety & Security Pte Ltd | Island Wide | - | OE | SO | Woodlands |
| SATS Ltd | East | - | OE | SO | Woodlands |
| ProtectPlus Pte Ltd | Island Wide | - | OE | SSO | Jurong East |
| Union Security Services Pte. Ltd. | Island Wide | - | OE | SS | Woodlands |
| ProtectPlus Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Mainguard Security Services (S) Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Trek Investigations & Security Management Services Pte Ltd | Island Wide | - | OE | SS | Sengkang |
| ProtectPlus Pte Ltd | Island Wide | - | OE | SS | Hougang |
| Crowne Plaza Changi Airport | East | In-House | OE | SS | Hougang |
| Titanium Safety & Security Pte Ltd | North | In-House | OE | SS | Hougang |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SS | Hougang |
| SATS Ltd | East | - | OE | SS | Hougang |
| Star Security Services | Island Wide | - | OE | SS | Woodlands |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Stalwart Security Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Securus Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Peregrine Security Pte. Ltd. | Island Wide | - | OE | SS | Woodlands |
| JEN Singapore Tanglin by Shangri-La | Central | In-House | OE | SSO | Bukit Batok |
| Inhouse Employer | Central | Hotel | OE | SSO | Bukit Batok |
| Guthrie FMC Security Pte Ltd | Island Wide | - | OE | SSO | Bukit Batok |
| Titanium Safety & Security Pte Ltd | Island Wide | - | OE | SSO | Bukit Batok |
| ProtectPlus Pte Ltd | Island Wide | - | OE | SO | Yishun |
| ProtectPlus Pte Ltd | Island Wide | - | OE | SO | Yishun |
| Titanium Safety & Security Pte Ltd | North | In-House | OE | SS | Admiralty |
| ProtectPlus Pte Ltd | Island Wide | - | OE | SO | Yishun |
