| Company | Timeline | Status | |
| Antiquarian Horological Society(The) Director • Company Director | 16 May 2015←10 Years→Current | Active | |
| Charles Frodsham & Co Limited Secretary • Horologist | 28 Mar 1999←3 Years→1 Feb 2003 | Active | |
| Charles Frodsham & Co Limited Director • Horologist | 2 Aug 1997←28 Years→Current | Active | |
