| Company | Timeline | Status | |
| Plextek Services Limited Director • Engineer | 22 Mar 2016←4 Months→11 Aug 2016 | Active | |
M.M.I. Research Limited Director • Engineer | 29 Nov 2004←6 Years→28 Feb 2011 | Dissolved | |
| Aptology Limited Director • Software Development | 12 Sep 2001←1 Year 11 Months→31 Aug 2003 | Active | |
| Hope Cote Lodge Management Company Limited Director • Unreported | 14 Aug 1994←6 Months→14 Feb 1995 | Active | |
| Hope Cote Lodge Management Company Limited Director • Research Engineer | 2 Aug 1991←2 Years 9 Months→6 May 1994 | Active | |
| Hope Cote Lodge Management Company Limited Director • Unreported | 1 Jan 1970←24 Years→6 May 1994 | Active | |
