| Company | Timeline | Status | |
| Sheffield Aero Club Limited Director • Engineer  | 29 Jul 2010←9 Years→12 Sep 2019  | Active  | |
| Installation Design Service Limited Secretary • Engineering Consultant  | 22 May 1992←33 Years→Current  | Active  | |
| Services Design Associates Limited Director • Engineer  | 30 Sep 1991←27 Years→26 Oct 2018  | Active  | |
