| Company | Timeline | Status | |
| Ian Gardner Consulting Limited Director • Civil Engineer  | 10 Nov 2020←9 Months→17 Aug 2021  | Dissolved  | |
| Gravitas Offshore Limited Director • Civil Engineer  | 13 Feb 2012←8 Years→24 Nov 2020  | Dissolved  | |
| Ove Arup & Partners Limited Director • Civil Engineer  | 1 Apr 1993←23 Years→31 Dec 2016  | Active  | |
| Ove Arup & Partners International Limited Director • Civil Structural Engineer  | 1 Apr 1993←8 Years→1 Jan 2002  | Active  | |
