| Company | Timeline | Status | |
| Institute Of Acoustics Limited (The) Director • Unreported | 4 Aug 2011←5 Years→5 Sep 2016 | Active | |
| Institute Of Acoustics Limited (The) Director • Unreported | 17 Apr 2000←6 Years→18 Jan 2007 | Active | |
| Institute Of Acoustics Limited (The) Director • Technical Manager | 15 Apr 1991←7 Years→9 Jun 1998 | Active | |
| Institute Of Acoustics Limited (The) Director • Unreported | 1 Jan 1970←28 Years→9 Jun 1998 | Active | |
