| # | Entity | Status | State |
|---|---|---|---|
| 1 | 28 004 008 548 G.A. MARKHAM CONSULTING ENGINEER PTY. LIMITED |
ABN Cancelled | NSW 2000 |
| 2 | 79 087 238 373 MARKHAM GRACE CONSULTING GROUP PTY LTD |
ABN Active | NSW 2480 |
| 3 | 87 459 593 357 O.H BARZ & Mitchell & Thompson Pty Ltd & R.F PICKARD & Savill Consultancy Pty Ltd & The Trustee for J.R.P Markham Family Trust & The Trustee for The Danny Masters Family Trust |
ABN Active | WA 6009 |
| 4 | 94 008 792 322 SAVILL CONSULTANCY PTY LTD & THE TRUSTEE FOR J R P MARKHAM FAMILY TRUST & O.H BARZ & R.F PICKARD |
ABN Active | WA 6017 |
| 5 | 15 419 490 080 MICHAEL GREGORY MARKHAM MARKHAM CONSULTING SERVICES |
ABN Cancelled | WA 6153 |
| 6 | 25 647 174 963 MISCHA ENTERPRISES PTY LTD MARKHAM TRAINING AND CONSULTING |
ABN Active | TAS 7018 |
| 7 | 78 621 640 469 ROBYN ANN MARKHAM Markham Consulting |
ABN Cancelled | NSW 2259 |
| 8 | 79 087 238 373 MARKHAM GRACE CONSULTING GROUP PTY LTD |
ABN Active | NSW 2480 |