| Company | Timeline | Status | |
| GHD Environment Limited Director • Company Director | 1 Jun 2016←3 Years→16 Dec 2019 | Active | |
| Gutteridge Haskins & Davey Limited Director • General Manager | 31 Mar 2016←3 Years→16 Dec 2019 | Active | |
| Birkett Stevens Colman Partnership Limited Director • Chemical Engineer | 17 Jul 2009←10 Years→16 Dec 2019 | Active | |
| Eddisbury Property Company Limited Director • Chemical Engineer | 19 Mar 2009←15 Years→6 Sep 2024 | Active | |
| George Hutchison Associates Limited Director • Chemical Engineer | 9 Feb 2006←13 Years→16 Dec 2019 | Active | |
| GHD Livigunn Limited Director • Chemical Engineer | 22 Dec 2005←13 Years→16 Dec 2019 | Active | |
| Livingston Gunn Projects Limited Director • Chemical Engineer | 28 Jun 1991←28 Years→16 Dec 2019 | Active | |
