| Company | Timeline | Status | |
Burke Electronics Limited Director • Engineer | 1 Apr 1999←19 Years→29 May 2018 | Dissolved | |
| Speck Analytical Limited Director • Unreported | 9 Jun 1998←27 Years→Current | Active | |
| Speck Analytical Limited Secretary • Manager | 9 Jun 1998←27 Years→Current | Active | |
