| Company | Timeline | Status | |
| Applied Actuarial Systems Limited Director • Engineer | 18 Apr 2017←2 Years 2 Months→13 Jul 2019 | Active | |
| Waste Conversion Technologies Limited Director • Engineer | 22 Feb 1994←26 Years→10 Nov 2020 | Dissolved | |
| Petbourne Limited Director • Engineer | 31 Aug 1992←28 Years→12 Jan 2021 | Dissolved | |
| Robin Herd Limited Director • Consultant Engineer | 10 Aug 1991←27 Years→6 Jun 2019 | Active | |
| Fairlawn Freeholders Limited Director • Managing Director | 12 Feb 1991←20 Years→11 Nov 2011 | Active | |
