| Company | Timeline | Status | |
| Gardner Watts Limited Director • Engineering Consultant | 16 Dec 1997←16 Years→20 Dec 2013 | Active | |
Beith & Associates Limited Director • Engineering | 29 Mar 1996←18 Years→15 Jul 2014 | Dissolved | |
Safety First Projects Ltd Director • Engineer | 29 Sep 1991←23 Years→1 Sep 2015 | Dissolved | |
