| Company | Timeline | Status | |
Mantiss Engineers Limited Director • Director | 2 Nov 2016←3 Years→6 Oct 2020 | Dissolved | |
Mantiss Engineering Limited Director • Consulting Engineer | 22 Jan 1992←24 Years→12 Jul 2016 | Dissolved | |
| Ventage Limited Director • Engineer | 5 Jun 1991←16 Years→3 Dec 2007 | Active | |
