| Aedge Services Pte Ltd | Island Wide | - | OM | SS | Bukit Batok |
| SECOM Singapore Pte Ltd | Island Wide | - | OE | SO | Bukit Batok |
| Eagle I Security Services Pte Ltd | Island Wide | - | OE | SO | Woodlands |
| Union Security Services Pte. Ltd. | Island Wide | - | OE | SSS | Boon Lay |
| Securus Pte Ltd | Island Wide | - | OE | SSS | Woodlands |
| SATS Ltd | Island Wide | - | OM | SSS | Woodlands |
| Aero Asia Security Systems Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| Inhouse Employer | Island Wide | - | OE | SS | Hougang |
| Star Security Services | Island Wide | - | Security Mgt | SS | Hougang |
| Inhouse Employer | Island Wide | Construction | OM | SS | Toa Payoh |
| Global Ritz Protection (Security Services) Pte Ltd | Island Wide | - | OE | SSS | Admiralty |
| Inhouse Employer | Island Wide | Construction | OM | CSO | Yishun |
| Aedge Services Pte Ltd | Island Wide | - | OM | CSO | Yishun |
| GATES PCM Integrated Services Pte Ltd | Island Wide | - | OE | SSO | Tampines |
| Eagle I Security Services Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| AGS Integration Pte. Ltd. | Island Wide | - | OE | SS | Woodlands |
| Union Security Services Pte. Ltd. | Island Wide | - | OE | SS | Woodlands |
| Union Security Services Pte. Ltd. | Island Wide | - | OE | SSS | Punggol |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SSS | Punggol |
| Ranger Investigation & Security Services Pte Ltd | Island Wide | In-House | SS | SSS | Punggol |
| Total Protection Solutions Pte Ltd | Island Wide | - | OM | Nil | Bukit Gombak |
| SATS Ltd | Island Wide | Commercial | SO | SO | Hougang |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | Commercial | SO | SO | Tai Seng |
| Inhouse Employer | Island Wide | Construction | OM | SS | Hougang |
| Star Security Services | Island Wide | - | Security Mgt | SSO | Kaki Bukit |
