| Company | Timeline | Status | |
| Birkett Stevens Colman Partnership Limited Director • Mechanical Engineer | 17 Jul 2009←16 Years→Current | Active | |
| OLD Pale Heights Management Company Limited Director • Company Director | 12 Dec 2006←19 Years→Current | Active | |
| George Hutchison Associates Limited Director • Mechanical Engineer | 9 Feb 2006←19 Years→Current | Active | |
| GHD Livigunn Limited Director • Mechanical Engineer | 22 Dec 2005←20 Years→Current | Active | |
| Livingston Gunn Projects Limited Director • Mechanical Engineer | 1 Jun 1997←28 Years→Current | Active | |
