| Company | Timeline | Status | |
| Basic Electronics Limited Secretary • Director | 1 Apr 2001←24 Years→Current | Active | |
| Basic Electronics Limited Director • Unreported | 20 Mar 2000←25 Years→Current | Active | |
| Square Root Design Limited Director • Company Director | 12 Jan 1991←35 Years→Current | Active | |
| Square Root Design Limited Director • Unreported | 1 Jan 1970←56 Years→Current | Active | |
