| Company | Timeline | Status | |
| A K Stewart Ltd Director • Contractor  | 31 Jul 2018←4 Months→18 Dec 2018  | Active  | |
| Stewart Strathpeffer Ltd Director • Contractor  | 23 Jul 2018←7 Years→Current  | Active  | |
| Wyvis (Hydro) Limited Director • Contractor  | 27 Jan 2003←22 Years→Current  | Active  | |
| Wyvis Plant & Power Limited Director • Contractor  | 22 May 1996←22 Years→18 Dec 2018  | Active  | |
