| Company | Timeline | Status | |
| Thornthwaite Hall Management Limited Director • Retired | 19 Feb 2006←19 Years→Current | Active | |
| Thornthwaite Hall Management Limited Director • Retired | 19 Feb 2006←18 Years→5 Dec 2024 | Active | |
Inspire Defence Limited Director • Consulting Engineer | 26 Nov 1991←2 Years 3 Months→28 Feb 1994 | Dissolved | |
Partners For Infrastructure Limited Director • Consulting Engineer | 26 Nov 1991←4 Years→31 Oct 1996 | Dissolved | |
| Jacobs European Holdings Limited Director • Consulting Engineer | 26 Nov 1991←4 Years→31 Oct 1996 | Dissolved | |
