| Trek Investigations & Security Management Services Pte Ltd | Island Wide | - | OE | SSS | Bukit Batok |
| Global Ritz Protection (Security Services) Pte Ltd | Island Wide | - | OE | SSS | Bukit Batok |
| Strive Security Pte Ltd | Island Wide | - | OE | SSS | Bukit Batok |
| FormTeam Consultancy Pte Ltd | Island Wide | - | OE | SSS | Bukit Batok |
| Inhouse Employer | East | In-House | SO | SSS | MacPherson |
| Inhouse Employer | South | In-House | SO | SSS | MacPherson |
| Resorts World Sentosa | South | Commercial | SS | SSS | Woodlands |
| Soverus Pte Ltd | Central | Commercial | SSS | SSS | Pioneer |
| Inhouse Employer | Island Wide | - | OE | SSS | Toa Payoh |
| SATS Ltd | East | - | OE | SSS | Toa Payoh |
| Crowne Plaza Changi Airport | East | In-House | OE | SSS | Toa Payoh |
| Artyzen Singapore | Central | Hotel | SS | SSS | Toa Payoh |
| SMS Investigation & Security Pte Ltd | Central | - | OM | SSS | Sengkang |
| Crowne Plaza Changi Airport | East | In-House | OM | SSS | Bishan |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SSS | Woodlands |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SSS | Woodlands |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SSS | Woodlands |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SSS | Woodlands |
| Trek Investigations & Security Management Services Pte Ltd | Island Wide | - | OE | SSS | Bukit Batok |
| Stalwart Security Pte Ltd | Island Wide | - | OE | SSS | Bukit Batok |
| G4S Secure Solutions (Singapore) Pte Ltd | Central | In-House | SSO | SSS | Bukit Batok |
| Securus Pte Ltd | Island Wide | - | OE | SSS | Bukit Batok |
| Labourtel Management Corporation Pte Ltd | West | Dormitory | CSO | SSS | Bukit Batok |
| Certis Group | West | Depot | SS | SSS | Bukit Batok |
| Apro Asian Protection Pte Ltd | Island Wide | - | OM | SSS | Jurong East |
