| Company | Timeline | Status | |
| The Institution Of Structural Engineers Benevolent Fund Director • Structural Engineer | 12 May 2006←9 Years→23 Jul 2015 | Active | |
| Gilbertson Consultants Limited Director • Consultancy | 8 Nov 2002←18 Years→16 Mar 2021 | Dissolved | |
| Glendene Avenue Residents' Association Limited Director • Chartered Engineer | 15 May 2002←3 Years→10 May 2006 | Active | |
