| Company | Timeline | Status | |
| Orbus Building Services Limited Director • Director | 11 Jul 2006←19 Years→Current | Liquidation | |
| SLM Mackenzie Limited Director • Civil Engineer | 10 Feb 2003←1 Year 8 Months→21 Oct 2004 | Active | |
| Concrete Repair Association Director • Civil Engineer | 26 Oct 2000←3 Years→14 Oct 2004 | Active | |
| Mackenzie Construction Limited Director • Director | 10 Apr 1990←14 Years→21 Oct 2004 | Active | |
