| Company | Timeline | Status | |
| Grampian Transport Museum Trust Director • Retired | 13 Sep 2006←7 Years→18 Aug 2014 | Active | |
| Seatofthepants.Net Ltd Secretary • Unreported | 25 Oct 2004←12 Years→19 May 2017 | Active | |
| Thomas Telford Limited Director • Retired | 4 Nov 2003←1 Year→4 Nov 2004 | Active | |
| Civil Engineering Contractors Association (Scotland) Director • Civil Engineering | 24 Feb 1998←2 Years 11 Months→31 Jan 2001 | Active | |
| Chap Group Limited Director • Chartered Civil Engineer | 30 Aug 1991←9 Years→9 Feb 2001 | Active | |
| Campbell Thomson Limited Director • Civil Engineer | 31 Mar 1989←32 Years→6 Feb 2022 | Liquidation | |
| Campbell Thomson Limited Director • Unreported | 1 Jan 1970←52 Years→6 Feb 2022 | Liquidation | |
