| Company | Timeline | Status | |
Insignis Limited Director • Chartered Engineer | 16 Aug 1995←4 Years→28 Jun 2000 | Dissolved | |
| Miranda Engineering Limited Director • Chartered Engineer | 29 Nov 1993←6 Years→11 Aug 2000 | Dissolved | |
| The Institution Of Engineers In Scotland Director • Managing Director | 22 May 1990←11 Months→30 Apr 1991 | Active | |
| Croftwell Limited Director • Chartered Engineer | 9 Jun 1989←18 Years→28 Sep 2007 | Active | |
