| Company | Timeline | Status | |
| Doone Silver Kerr Limited Director • Director | 1 Sep 2012←9 Years→30 May 2022 | Active | |
| John Silver Associates Limited Director • Director | 18 Jan 2011←14 Years→Current | Active | |
| Flanagan Lawrence Limited Director • Architect | 15 Jun 2004←6 Years→31 Mar 2011 | Active | |
| Foster + Partners Limited Director • Architect | 1 Mar 1995←9 Years→14 Jun 2004 | Active | |
