| # | Entity | Status | State |
|---|---|---|---|
| 1 | 23 003 678 073 D & O ENGINEERING PTY. LTD. |
ABN Active | NSW 2150 |
| 2 | 27 006 369 348 O. D. T. ENGINEERING PTY. LTD. |
ABN Active | VIC 3175 |
| 3 | 55 086 016 337 O.R.D. CONSULTING ENGINEERS PTY. LTD. |
ABN Cancelled | VIC 3874 |
| 4 | 30 640 125 372 OTTO DETHLEFSEN O D ENGINEERING |
ABN Cancelled | WA 6169 |
| 5 | 33 119 256 462 DESMOND CHARTRES D & O ENGINEERING |
ABN Cancelled | QLD 4311 |
| 6 | 36 518 800 159 MARK WILLIAM PITMAN O.D.S. Engineering |
ABN Cancelled | QLD 4562 |
| 7 | 38 598 559 966 TONY O'DONOGHUE T.O.D. Engineering |
ABN Cancelled | WA 6220 |
| 8 | 42 591 354 052 ROSS NEIL MADDISON D.O.T. ENGINEERING |
ABN Active | WA 6065 |
| 9 | 52 266 847 986 ROSS N MADDISON & LESLIE J HALL D O T ENGINEERING |
ABN Cancelled | WA 6065 |
| 10 | 64 160 658 919 D CHARTRES & B.M CHARTRES D & O Engineering |
ABN Cancelled | QLD 4311 |