| Company | Timeline | Status | |
| Acer Partnerships Limited Director • Consultant Engineer  | 22 Nov 1991←8 Years→30 Dec 1999  | Dissolved  | |
Acer Sir Bruce White Limited Director • Consultant Engineer  | 21 Nov 1991←2 Years 3 Months→24 Feb 1994  | Dissolved  | |
| Arcadis Consulting (UK) Limited Director • Consultant Engineer  | 31 May 1991←8 Years→30 Dec 1999  | Active  | |
