| Company | Timeline | Status | |
| The Institution Of Engineers In Scotland Director • Retired | 30 May 2018←3 Years→15 Dec 2021 | Active | |
| Sir William Halcrow & Partners Limited Director • Chartered Engineer | 3 Jun 1997←7 Years→6 Dec 2004 | Dissolved | |
| Crouch Hogg Waterman Limited Director • Chartered Engineer | 7 Oct 1994←17 Years→28 Mar 2012 | Dissolved | |
