| Company | Timeline | Status | |
| Acoustic Sales Limited Director • Engineer | 6 Nov 2003←22 Years→Current | Active | |
| Acoustic Sales Limited Secretary • Engineer | 6 Nov 2003←22 Years→Current | Active | |
| Waterloo Acoustics Ltd Secretary • Engineer | 6 Apr 2000←25 Years→Current | Active | |
| Waterloo Acoustics Ltd Director • Engineer | 6 Apr 2000←25 Years→Current | Active | |
