| ProtectPlus Pte Ltd | Island Wide | - | OE | SS | Ang Mo Kio |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | - | SSS | SS | Ang Mo Kio |
| Metropolis Security Systems Pte Ltd | Island Wide | - | OE | SS | Ang Mo Kio |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SS | Ang Mo Kio |
| FormTeam Consultancy Pte Ltd | Island Wide | - | OE | SS | Ang Mo Kio |
| Force-One Security | Central | Commercial | SO | SS | Ang Mo Kio |
| William Secure Solutions Pte Ltd | Central | Condominium | SS | SS | Ang Mo Kio |
| A+ Officers Security Pte Ltd | Island Wide | Construction | SO | SS | Ang Mo Kio |
| York Hotel (Private) Limited | Central | In-House | OM | SS | Ang Mo Kio |
| PICO Guards Pte Ltd | South | - | SSS | SS | Ang Mo Kio |
| Reachfield Security & Safety Management Pte Ltd | North | School | SSS | SS | Ang Mo Kio |
| Certis Group | South | Healthcare | SS | SS | Ang Mo Kio |
| SMS Investigation & Security Pte Ltd | Central | Condominium | SS | SS | Ang Mo Kio |
| DP Quest Investigation Consultancy Pte Ltd | West | Condominium | SSO | SS | Boon Lay |
| Ascentiaa Security Management Pte Ltd | Island Wide | Condominium | SS | SS | Boon Lay |
| SATS Ltd | Island Wide | Commercial | SO | SS | Woodlands |
| SATS Ltd | East | - | OE | SS | Eunos |
| Apro Asian Protection Pte Ltd | Island Wide | - | OM | SS | Tampines |
| Orchid Hotel Private Limited | Central | In-House | OM | SS | Tampines |
| JEN Singapore Tanglin by Shangri-La | Central | In-House | OM | SS | Tampines |
| Inhouse Employer | Central | Country Club | OM | SS | Tampines |
| Prosegur Singapore Pte Ltd | Island Wide | - | OE | SS | Tampines |
| Park Regis by Prince, Singapore | Central | Hotel | SSO | SS | Punggol |
| Union Security Services Pte. Ltd. | North | - | SSO | SS | Bukit Panjang |
| SATS Ltd | Island Wide | Commercial | SO | SS | Woodlands |
