| Ademco Security Pte Ltd | West | Mix-Development | SO | SO | Choa Chu Kang |
| Chang & Chang Security Management Pte. Ltd. | West | Condominium | SO | SO | Choa Chu Kang |
| Metropolis Security Systems Pte Ltd | West | Industrial / Factory | SO | SO | Choa Chu Kang |
| PICO Guards Pte Ltd | South | Commercial | SSS | SSS | Choa Chu Kang |
| AGS Integration Pte. Ltd. | West | In-House | SS | SSS | Choa Chu Kang |
| Inhouse Employer | North | Commercial | SO | SO | Choa Chu Kang |
| Elid Technology International Pte Ltd | West | Condominium | SO | SO | Choa Chu Kang |
| Mainguard Security Services Singapore Pte Ltd | Central | Gov Building | SS | SS | Choa Chu Kang |
| Elid Technology International Pte Ltd | West | Condominium | SO | SO | Choa Chu Kang |
| Chang & Chang Security Management Pte. Ltd. | East | Condominium | SS | SS | Choa Chu Kang |
| Jasa Investigation & Security Services Pte Ltd | East | Condominium | SS | SS | Choa Chu Kang |
| Security Masters Pte Ltd | Central | - | Security Mgt | SS | Choa Chu Kang |
| Total Protection Solutions Pte Ltd | Island Wide | - | OM | SS | Choa Chu Kang |
| SMS Investigation & Security Pte Ltd | Central | - | OM | SS | Choa Chu Kang |
| Union Security Services Pte. Ltd. | East | Data Centre | SS | SS | Choa Chu Kang |
| Union Security Services Pte. Ltd. | East | Data Centre | SS | SS | Choa Chu Kang |
| Certis Group | Island Wide | - | SSO | SSO | Choa Chu Kang |
| Securus Pte Ltd | Island Wide | - | OE | CSO | Choa Chu Kang |
| AGS Integration Pte. Ltd. | West | In-House | SS | SS | Choa Chu Kang |
| Dragnet Smartech Security Pte Ltd | Central | - | Security Mgt | CSO | Choa Chu Kang |
| Royal Security Management Services Pte Ltd | West | Construction | SO | SO | Choa Chu Kang |
| Inhouse Employer | Central | In-House | SSS | SSS | Choa Chu Kang |
| Inhouse Employer | Island Wide | Construction | OM | SS | Choa Chu Kang |
| Orchid Hotel Private Limited | Central | In-House | OM | SO | Choa Chu Kang |
| Dragnet Smartech Security Pte Ltd | Central | - | Security Mgt | SO | Choa Chu Kang |
