| Unique Security Services Pte Ltd | South | Condominium | SO | SSO | Tiong Bahru |
| Reachfield Security & Safety Management Pte Ltd | Central | Gov Building | SO | SSO | Tiong Bahru |
| Inhouse Employer | East | In-House | SO | SSO | - |
| Force-One Security | Central | Commercial | SO | SSO | - |
| Trek Investigations & Security Management Services Pte Ltd | West | Industrial / Factory | SO | Nil | Jurong East |
| Prosec Services Pte Ltd | Central | Mix-Development | SO | Nil | Jurong East |
| Pan Pacific Serviced Suites Beach Road | South | In-House | SO | SSO | - |
| Inhouse Employer | Central | In-House | SO | SSO | - |
| Inhouse Employer | Central | Hotel | SO | SSO | - |
| Inhouse Employer | North | In-House | SO | SSO | - |
| Mainguard Security Services (S) Pte Ltd | South | Construction | SO | Nil | Aljunied |
| Force-One Security | North | Data Centre | SO | SO | Hougang |
| Reachfield Security & Safety Management Pte Ltd | Central | School | SO | SS | - |
| Aigle Security Pte Ltd | Central | Commercial | SO | SO | Punggol |
| Aigle Security Pte Ltd | East | Commercial | SO | SO | Punggol |
| First Security & Private Investigation (Singapore) Pte Ltd | South | Condominium | SO | SO | Punggol |
| SMS Investigation & Security Pte Ltd | East | Condominium | SO | SSO | Pasir Ris |
| Inhouse Employer | Central | School | SO | SSO | Bukit Gombak |
| SMS Investigation & Security Pte Ltd | Central | Condominium | SO | SO | Sengkang |
| Elid Technology International Pte Ltd | North | Condominium | SO | SO | Sengkang |
| Inhouse Employer | North | In-House | SO | SSO | Bukit Gombak |
| Inhouse Employer | East | In-House | SO | SO | Punggol |
| Inhouse Employer | West | Industrial / Factory | SO | SSO | Bukit Gombak |
| Metropolis Security Systems Pte Ltd | Central | Condominium | SO | SO | Mountbatten |
| Elid Technology International Pte Ltd | East | Condominium | SO | SO | Mountbatten |
