| Company | Timeline | Status | |
Qmet Limited Director • University Lecturer | 5 Sep 2013←3 Years→13 Sep 2016 | Dissolved | |
| Oxford Microbeams Limited Director • Lecturer/researcher | 22 Jan 1992←33 Years→Current | Active | |
| Oxford Microbeams Limited Secretary • Lecturer/researcher | 22 Jan 1992←13 Years→5 Aug 2005 | Active | |
