| Company | Timeline | Status | |
| Macduff Shellfish (Scotland) Limited Director • Director | 25 Sep 1999←6 Years→31 May 2006 | Active | |
| Stewart-Buchanan Gauges Limited Director • Director | 26 Oct 1989←27 Years→1 Jan 2017 | Active | |
| Stewart-Buchanan Gauges Limited Director • Unreported | 1 Jan 1970←47 Years→1 Jan 2017 | Active | |
