| Young Women's Christian Association of Singapore | Central | In-House | Security Mgt | SS | Sembawang |
| Legion Protection Pte Ltd | Island Wide | - | OE | SS | Bukit Batok |
| Certis Group | Central | Healthcare | SO | SO | Punggol |
| Premier Security Co-operative Ltd | South | Retail | SSO | SSS | Yishun |
| Securus Pte Ltd | East | Commercial | SO | SO | Sengkang |
| Force-One Security | North | Data Centre | OE | SSO | Simei |
| Securitas Guarding Services (Singapore) Pte Ltd | East | Data Centre | SS | CSO | Yishun |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OM | Nil | Tampines |
| Global Ritz Protection (Security Services) Pte Ltd | West | Industrial / Factory | SS | SS | - |
| Peregrine Security Pte. Ltd. | Island Wide | - | OE | CSO | Marsiling |
| PICO Guards Pte Ltd | Island Wide | - | OE | SSS | Choa Chu Kang |
| AGS Integration Pte. Ltd. | Island Wide | - | OE | CSO | Pasir Ris |
| Reachfield Security & Safety Management Pte Ltd | Central | School | Security Mgt | SS | Clementi |
| Ranger Investigation & Security Services Pte Ltd | Central | Condominium | SO | SSO | Woodlands |
| Soverus Pte Ltd | North | Industrial / Factory | SO | SO | Yishun |
| Young Women's Christian Association of Singapore | Central | In-House | SS | SSS | Marsiling |
| Apro Asian Protection Pte Ltd | Island Wide | - | OM | SSO | Simei |
| Total Protection Solutions Pte Ltd | Island Wide | - | OM | Nil | Ang Mo Kio |
| Union Security Services Pte. Ltd. | East | Data Centre | SS | SSS | Tampines |
| PICO Guards Pte Ltd | Central | Commercial | SSO | SS | Tiong Bahru |
| Artyzen Singapore | Central | Hotel | SO | SSO | Redhill |
| Inhouse Employer | West | In-House | OM | SS | Toa Payoh |
| Inhouse Employer | Central | Hotel | OE | SSO | Boon Lay |
| SATS Ltd | Island Wide | - | OM | CSO | Marsiling |
| RAS Security Pte Ltd | North | Commercial | OE | SS | Bukit Batok |
