| Company | Timeline | Status | |
| The Fine Art Trade Guild Director • Picture Restorer | 22 Mar 2007←3 Years→24 Mar 2010 | Active | |
| The Fine Art Trade Guild Director • Picture Conserator | 1 Jan 1995←5 Years→8 Apr 2000 | Active | |
| Leveton & Sons(Norwich)Limited Director • Fine Art Dealer | 4 Dec 1992←33 Years→Current | Active | |
