| Company | Timeline | Status | |
| David Tinker & Associates Limited Secretary • Chartered Engineer  | 22 Feb 2005←20 Years→Current  | Active  | |
| David Tinker & Associates Limited Director • Chartered Engineer  | 22 Feb 2005←20 Years→Current  | Active  | |
| Institution Of Agricultural Engineers(The) Director • Research Engineer  | 16 May 1995←12 Years→8 May 2008  | Active  | |
