| Company | Timeline | Status | |
| Blyth Metals Limited Director • Economist | 5 Jan 2012←13 Years→Current | Active | |
| E.E.Blyth & Co Limited Director • Economist | 24 Jun 2011←14 Years→Current | Active | |
| Blyth Marble Limited Director • Economist | 31 Jul 1992←33 Years→Current | Active | |
