| Company | Timeline | Status | |
| Walker Hall Associates Limited Director • Director | 30 Sep 2012←13 Years→Current | Active | |
| Walker Hall Associates Limited Director • Director | 15 Oct 2010←1 Month→15 Nov 2010 | Active | |
| Celerity (Scotland) Limited Director • Consultant | 26 Aug 2004←19 Years→28 Jun 2024 | Active | |
| Sarazen Limited Director • Director | 4 May 2004←21 Years→Current | Active | |
| Santerem Limited Director • Director | 1 Sep 2003←22 Years→Current | Active | |
| Celerity Limited Director • Consultant | 5 Jul 2002←21 Years→28 Jun 2024 | Active | |
