| Company | Timeline | Status | |
| Doff Portland Limited Director • Chairman | 11 Jan 2013←4 Years→14 Mar 2017 | Active | |
Doff Portland Trustees Limited Director • Director | 9 Jun 2011←2 Years 11 Months→27 May 2014 | Dissolved | |
| Doff Technologies Limited Director • Company Director | 2 Mar 1999←18 Years→14 Mar 2017 | Active | |
| Doff Portland Limited Director • Company Director | 5 Oct 1991←21 Years→3 Dec 2012 | Active | |
| GHW Limited Director • Company Director | 11 Aug 1991←25 Years→14 Mar 2017 | Dissolved | |
