| Crowne Plaza Changi Airport | East | In-House | OE | CSO | Marsiling |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| Guthrie FMC Security Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | Commercial | OE | CSO | Marsiling |
| FormTeam Consultancy Pte Ltd | Island Wide | - | OE | SSS | Bukit Batok |
| Securus Pte Ltd | Island Wide | - | OE | SS | Clementi |
| Peregrine Security Pte. Ltd. | Island Wide | - | OE | SS | Clementi |
| Overseas (Singapore) Security & Private Investigation Consultants Pte Ltd | Island Wide | - | OE | SS | Clementi |
| Guthrie FMC Security Pte Ltd | Island Wide | - | OE | SS | Clementi |
| FormTeam Consultancy Pte Ltd | Island Wide | - | OE | SS | Clementi |
| Overseas (Singapore) Security & Private Investigation Consultants Pte Ltd | Island Wide | - | OE | SS | Clementi |
| G4S Secure Solutions (Singapore) Pte Ltd | Island Wide | - | OE | SS | Clementi |
| SATS Ltd | East | - | OE | SS | Clementi |
| Soverus Pte Ltd | Island Wide | - | OE | SS | Clementi |
| Securus Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| Inhouse Employer | Central | Hotel | OE | SSO | Boon Lay |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | Commercial | OE | SSO | Boon Lay |
| Metropolis Security Systems Pte Ltd | Island Wide | - | OE | SSO | Boon Lay |
| Guthrie FMC Security Pte Ltd | Island Wide | - | OE | SSO | Boon Lay |
| G4S Secure Solutions (Singapore) Pte Ltd | Island Wide | - | OE | SSO | Boon Lay |
| Titanium Safety & Security Pte Ltd | North | In-House | OE | SSO | Boon Lay |
| Crowne Plaza Changi Airport | East | In-House | OE | SSO | Boon Lay |
| Inhouse Employer | Island Wide | - | OE | SSO | Boon Lay |
| Inhouse Employer | Central | Hotel | OE | SSO | Boon Lay |
| JEN Singapore Tanglin by Shangri-La | Central | In-House | OE | SSO | Boon Lay |
