| Company | Timeline | Status | |
| Promel Ltd Director • Executive | 2 Jan 2007←9 Months→5 Oct 2007 | Active | |
| Nutriceut Limited Director • Unreported | 14 Dec 2006←19 Years→Current | Active | |
| Dairy Solutions Limited Director • Director | 19 Aug 2002←8 Years→30 Jun 2011 | Active | |
| Dairy Crest Food Ingredients Limited Director • Dairy Products Executive | 1 May 1997←10 Years→6 Dec 2007 | Dissolved | |
| The Fayrefield Group Limited Director • Unreported | 8 Jun 1994←31 Years→Current | Active | |
| Greenfields Ireland Limited Director • Director | 28 Oct 1992←15 Years→5 Jun 2008 | Active | |
| John Douglas Kerr Limited Director • Dairy Products Executive | 16 Dec 1991←34 Years→Current | Active | |
| Fayrefield Foods Limited Director • Dairy Products Executive | 29 Sep 1991←34 Years→Current | Active | |
| Linsey Kerr Limited Director • Company Director | 31 Dec 1990←35 Years→Current | Active | |
| John Douglas Kerr Limited Director • Unreported | 1 Jan 1970←56 Years→Current | Active | |
