| Company | Timeline | Status | |
| Suprex Limited Director • Research Scientist | 9 Jun 2016←1 Year 7 Months→31 Jan 2018 | Dissolved | |
The Green Chemistry Network Director • Director | 16 Apr 2009←1 Year 8 Months→2 Jan 2011 | Dissolved | |
| British Essential Oil Association Limited(The) Director • Ceo | 5 Jun 2003←1 Year 11 Months→26 May 2005 | Active | |
| Simply Hops Ltd Director • Executive | 14 Nov 2002←4 Years→1 Mar 2007 | Active | |
| Barth Innovations Limited Director • Company Director | 1 Oct 2002←4 Years→1 Mar 2007 | Dissolved | |
| Barth-Haas UK Limited Director • Company Director | 9 Oct 2000←6 Years→1 Mar 2007 | Active | |
| Elixarome Limited Director • Company Director | 14 Feb 2000←7 Years→1 Mar 2007 | Active | |
| The British Hop Association Secretary • Unreported | 9 Dec 1997←5 Years→11 Dec 2002 | Active | |
| Orchard House Foods Limited Director • Company Director | 1 Feb 1994←2 Years 4 Months→21 Jun 1996 | In Administration | |
