| Aedge Services Pte Ltd | Island Wide | - | OM | SSS | Sengkang |
| Aero Asia Security Systems Pte Ltd | Island Wide | - | OE | SS | Sengkang |
| Global Ritz Protection (Security Services) Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| Metropolis Security Systems Pte Ltd | East | Condominium | SO | SO | Sengkang |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SS | Sengkang |
| Global Ritz Protection (Security Services) Pte Ltd | Island Wide | - | OE | SS | Sengkang |
| Crowne Plaza Changi Airport | East | In-House | OE | SS | Sengkang |
| FormTeam Consultancy 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 |
| Aigle Security Pte Ltd | Island Wide | - | OE | SS | Sengkang |
| SMS Investigation & Security Pte Ltd | Central | Condominium | SS | SS | Sengkang |
| Union Security Services Pte. Ltd. | East | Data Centre | SS | SS | Sengkang |
| Certis Group | Island Wide | - | SSO | SS | Sengkang |
| Inhouse Employer | West | In-House | OM | SS | Sengkang |
| Aigle Security Pte Ltd | Island Wide | - | OE | SSO | Sengkang |
| Crowne Plaza Changi Airport | East | In-House | OE | SSO | Sengkang |
| GATES PCM Integrated Services Pte Ltd | Island Wide | - | OE | SSO | Sengkang |
| Union Security Services Pte. Ltd. | East | Data Centre | SS | SSO | Sengkang |
| 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 |
