| Company | Timeline | Status | |
| Antiquarian Booksellers Association (International) Director • Bookseller | 1 Jan 2004←7 Years→12 May 2011 | Active | |
| Upperthorn Limited Director • Bookseller | 30 Apr 1992←19 Years→12 May 2011 | Active | |
| Upperthorn Limited Secretary • Unreported | 30 Apr 1992←19 Years→12 May 2011 | Active | |
