| Company | Timeline | Status | |
| Iqe Silicon Compounds Limited Director • Executive Chairman | 24 Sep 2018←9 Months→25 Jun 2019 | Active | |
| Wafer Technology International Limited Director • Executive Chairman | 24 Sep 2018←9 Months→25 Jun 2019 | Active | |
| Wafer Technology Limited Director • Executive Chairman | 24 Sep 2018←9 Months→25 Jun 2019 | Active | |
| Epi Holdings Limited Director • Chartered Accountant | 10 Apr 2018←1 Year 2 Months→25 Jun 2019 | Active | |
| Compound Semiconductor Centre Limited Director • Chartered Accountant | 9 Apr 2018←11 Months→28 Mar 2019 | Active | |
| Nanogan Limited Director • Chartered Accountant | 9 Apr 2018←1 Year 2 Months→25 Jun 2019 | Active | |
| McMillan Williams Solicitors Ltd Director • Chairman | 1 Jan 2015←11 Months→8 Dec 2015 | Liquidation | |
| Mesuro Limited Director • Director | 3 Nov 2011←3 Years→15 Jan 2015 | Active | |
Norwich Airport (Site 4) Limited Director • Director | 27 Oct 2011←2 Years 7 Months→6 Jun 2014 | Dissolved | |
| Seren Photonics Limited Director • Chartered Accountant | 1 May 2010←8 Years→31 May 2018 | Dissolved | |
