| # | Entity | Status | State |
|---|---|---|---|
| 1 | 41 162 456 859 ECI CONSTRUCTION ENGINEERING PTY LTD |
ABN Active | WA 6004 |
| 2 | 41 666 545 311 ECI NOISE CONTROL ENGINEERING PTY LTD |
ABN Active | VIC 3195 |
| 3 | 58 147 025 545 ECI Engineering Pty Ltd |
ABN Cancelled | WA 6007 |
| 4 | 99 663 237 563 ECI ENGINEERING PTY LTD |
ABN Active | WA 6017 |
| 5 | 58 147 025 545 ECI Engineering Pty Ltd |
ABN Cancelled | WA 6007 |