| Soverus Pte Ltd | Island Wide | - | OE | SSS | Toa Payoh |
| SATS Ltd | East | - | OE | SSS | Toa Payoh |
| Crowne Plaza Changi Airport | East | In-House | OE | SSS | Toa Payoh |
| G4S Secure Solutions (Singapore) Pte Ltd | Island Wide | - | OE | SSS | Tampines |
| Global Ritz Protection (Security Services) Pte Ltd | Island Wide | - | OE | SS | - |
| Soverus Pte Ltd | Island Wide | - | OE | SSS | Toa Payoh |
| SATS Ltd | East | - | OE | SSS | Toa Payoh |
| Crowne Plaza Changi Airport | East | In-House | OE | SSS | Toa Payoh |
| Inhouse Employer | Island Wide | - | OE | SSS | Toa Payoh |
| Guthrie FMC Security Pte Ltd | Island Wide | - | OE | CSO | Toa Payoh |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SSS | Yishun |
| SATS Ltd | East | - | OE | SSS | Toa Payoh |
| FormTeam Consultancy Pte Ltd | Island Wide | - | OE | Nil | Bukit Batok |
| Securus Pte Ltd | Island Wide | - | OE | SSS | Tampines |
| Inhouse Employer | Island Wide | - | OE | SSS | Toa Payoh |
| Crowne Plaza Changi Airport | East | In-House | OE | SSS | Toa Payoh |
| Trek Investigations & Security Management Services Pte Ltd | Island Wide | - | OE | CSO | Toa Payoh |
| Aero Asia Security Systems Pte Ltd | Island Wide | - | OE | CSO | Toa Payoh |
| FormTeam Consultancy Pte Ltd | Island Wide | - | OE | Nil | Bukit Batok |
| Titanium Safety & Security Pte Ltd | Island Wide | - | OE | Nil | Bukit Batok |
| Trek Investigations & Security Management Services Pte Ltd | Island Wide | - | OE | Nil | Bukit Batok |
| Aero Asia Security Systems Pte Ltd | Island Wide | - | OE | Nil | Bukit Batok |
| Overseas (Singapore) Security & Private Investigation Consultants Pte Ltd | Island Wide | - | OE | Nil | Bukit Batok |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | Nil | Bukit Batok |
| Mainguard Security Services (S) Pte Ltd | Island Wide | - | OE | Nil | Bukit Batok |
