| GATES PCM Integrated Services Pte Ltd | Central | Gov Building | SO | SS | Pioneer |
| Inhouse Employer | Central | Hotel | SO | SO | Tuas Link |
| Union Security Services Pte. Ltd. | Central | Industrial / Factory | SS | SS | Woodlands |
| Jasa Investigation & Security Services Pte Ltd | Central | Commercial | SS | SS | Woodlands |
| Danmax Security Management Pte Ltd | Central | Condominium | SS | SS | Woodlands |
| IGC Security Services Pte Ltd | Central | Condominium | SS | SS | Woodlands |
| G4S Secure Solutions (Singapore) Pte Ltd | Central | In-House | SSO | SS | Bukit Panjang |
| Pedro Investigations & Security Services Pte. Ltd. | Central | - | SSO | SS | Bukit Panjang |
| Regal Security & Fire Management Services Pte Ltd | Central | - | OE | SS | Bukit Panjang |
| Dragnet Smartech Security Pte Ltd | Central | - | Security Mgt | CSO | Queenstown |
| Inhouse Employer | Central | In-House | SSS | SSS | Bedok |
| Premier Security Co-operative Ltd | Central | Healthcare | SSS | SSS | Pasir Ris |
| York Hotel (Private) Limited | Central | In-House | OM | SSS | Pasir Ris |
| Reachfield Security & Safety Management Pte Ltd | Central | School | SO | SSS | Pasir Ris |
| SMS Investigation & Security Pte Ltd | Central | Condominium | SSO | SSS | Pasir Ris |
| York Hotel (Private) Limited | Central | In-House | OM | SSS | Pasir Ris |
| SMS Investigation & Security Pte Ltd | Central | Condominium | SS | SSS | Pasir Ris |
| Trek Investigations & Security Management Services Pte Ltd | Central | Commercial | SO | SO | Punggol |
| Peregrine Security Pte. Ltd. | Central | - | SSO | CSO | Bedok |
| TwinRock Global | Central | - | SO | CSO | Bedok |
| Metropolis Security Systems Pte Ltd | Central | Condominium | SS | SS | Jurong East |
| TwinRock Global | Central | - | SO | CSO | Bedok |
| Dragnet Smartech Security Pte Ltd | Central | Commercial | SO | SSO | Tampines |
| IGC Security Services Pte Ltd | Central | Condominium | SSO | SSO | Sengkang |
| Soverus Pte Ltd | Central | Commercial | SSO | SS | Buona Vista |
