| Company | Timeline | Status | |
| Ecohouse Initiative Ltd Director • Professor | 5 Sep 2013←12 Years→Current | Active | |
| Ecohouse Initiative Ltd Director • Professor | 5 Sep 2013←12 Years→16 Sep 2025 | Active | |
| I.S. Books Limited Director • Bookseller | 6 Dec 1991←4 Years→3 Jan 1996 | Active | |
