| Company | Timeline | Status | |
| Morgenwonen Limited Director • Director | 20 Nov 2006←1 Year 9 Months→31 Aug 2008 | Active | |
| Volkerhighways Limited Director • Director | 20 Nov 2006←1 Year 9 Months→31 Aug 2008 | Active | |
| Volkerwessels Limited Director • Managing Director | 17 May 2004←4 Years→31 Aug 2008 | Active | |
| Fitzpatrick International Limited Director • Civil Engineer | 7 May 1996←3 Years→31 Jul 1999 | Dissolved | |
| Volkerfitzpatrick Limited Director • Managing Director | 1 Nov 1994←13 Years→31 Aug 2008 | Active | |
| Birse Group Limited Director • Engineer | 27 Sep 1992←1 Year 6 Months→21 Apr 1994 | Active | |
| Birse Construction Limited Director • Director | 18 Oct 1991←2 Years 6 Months→21 Apr 1994 | Liquidation | |
