| Company | Timeline | Status | |
| A&E Environmental Services Limited Director • Company Director | 1 Jun 2010←12 Years→20 Sep 2022 | Dissolved | |
| B.G. Williams & Associates Ltd Director • Director | 27 Mar 2007←18 Years→Current | Active | |
| Balfour Beatty Rail Infrastructure Services Limited Director • General Manager | 10 Jul 1992←3 Months→9 Oct 1992 | Active | |
| Haden Young Limited Director • General Manager | 10 Jul 1992←3 Months→9 Oct 1992 | Active | |
| Balfour Beatty Rail Projects Limited Director • General Manager | 11 Jul 1991←1 Year 3 Months→9 Oct 1992 | Active | |
| Balfour Beatty Kilpatrick Limited Director • Manager | 11 Jul 1990←2 Years 3 Months→9 Oct 1992 | Active | |
| Lounsdale Electric Limited Director • General Manager | 1 Jan 1970←22 Years→9 Oct 1992 | Active | |
