| Company | Timeline | Status | |
| Midland Heat Pumps Limited Director • Heating Engineer | 3 May 2000←25 Years→Current | Active | |
| Williams Air Conditioning Limited Director • Refrigeration Engineer | 29 Nov 1991←34 Years→Current | Active | |
| Williams Air Conditioning Limited Director • Unreported | 1 Jan 1970←56 Years→Current | Active | |
