| Mainguard Security Services (S) Pte Ltd | West | - | SS | SS | - |
| Global Ritz Protection (Security Services) Pte Ltd | Island Wide | - | OE | SS | Bukit Panjang |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OM | SS | Tampines |
| ARSLAN SRS Singapore | South | In-House | RSOC/CAMS Op | SSO | Lakeside |
| PICO Guards Pte Ltd | Island Wide | - | OM | SS | Pioneer |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SSS | Clementi |
| G4S Secure Solutions (Singapore) Pte Ltd | Island Wide | - | OE | CSO | Pasir Ris |
| Premier Security Co-operative Ltd | Central | Healthcare | SSS | CSO | Toa Payoh |
| Acestes Pte Ltd | Island Wide | - | OM | CSO | Choa Chu Kang |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | Commercial | OE | SSS | Yishun |
| Republic of Singapore Yacht Club | West | In-House | SO | SO | - |
| Eagle I Security Services Pte Ltd | Island Wide | - | OE | SS | Sengkang |
| AGS Integration Pte. Ltd. | Island Wide | - | SS | SS | Bukit Batok |
| Fervour Pte Ltd | North | Retail | SO | SO | Aljunied |
| Strive Security Pte Ltd | Island Wide | - | OE | CSO | Pasir Ris |
| Certis Group | East | Gov Building | SO | SO | Bedok |
| Inhouse Employer | West | In-House | OM | SSS | Dover |
| Acestes Pte Ltd | Island Wide | - | OM | SSS | Yishun |
| SATS Ltd | Island Wide | - | Inves | SSO | Boon Lay |
| Union Security Services Pte. Ltd. | East | Data Centre | SS | SO | Pasir Ris |
| Uniforce Security Services Pte Ltd | Island Wide | - | OE | SO | Tampines |
| Bulls-Eye Security Services Pte Ltd | Central | Healthcare | SSS | SSS | Aljunied |
| Orchid Hotel Private Limited | Central | In-House | OM | SSS | Yishun |
| A-SAT Pte Ltd | North | Mix-Development | SSO | SS | Woodlands |
| Total Protection Solutions Pte Ltd | Island Wide | - | OM | SS | Bukit Panjang |
