| # | Entity | Status | State |
|---|---|---|---|
| 1 | 26 076 366 768 B.P. O'BRIEN BUILDING SERVICES PTY LTD |
ABN Active | NSW 2074 |
| 2 | 17 257 853 692 A.G O'BRIEN & K.J O'BRIEN O'BRIENS PLUMBING AND BUILDING SERVICES |
ABN Cancelled | SA 5522 |
| 3 | 23 779 339 355 ANTHONY MARCUS O'BRIEN O'Brien Building Services |
ABN Cancelled | ACT 2902 |
| 4 | 25 933 970 896 FRANK O'BRIEN o'brien building services |
ABN Cancelled | WA 6008 |
| 5 | 38 765 305 870 RORY O'BRIEN o'brien building services |
ABN Cancelled | NSW 2065 |
| 6 | 48 879 027 172 PAUL KENNETH O'BRIEN PAUL O'BRIEN BUILDING SERVICES |
ABN Cancelled | NSW 2582 |
| 7 | 73 561 419 280 WAYNE MAURICE O'BRIEN WAYNE OBRIEN BUILDING AND CARPENTRY SERVICES |
ABN Active | NSW 2097 |
| 8 | 86 537 570 659 MARK ANDREW OBRIEN MARK OBRIEN BUILDING SERVICES |
ABN Active | NSW 2450 |
| 9 | 91 121 418 196 DANNY JOHN O'BRIEN OBRIEN BUILDING SERVICES |
ABN Cancelled | QLD 4868 |
| 10 | 86 537 570 659 MARK ANDREW OBRIEN MARK O'BRIEN BUILDING SERVICES |
ABN Active | NSW 2450 |