| Company | Timeline | Status | |
| O.T.C. Consultancy Ltd Director • Managing Director | 11 Oct 1995←2 Years 10 Months→20 Aug 1998 | Active | |
| Oldham Engineering Group Training Association Limited (The) Director • Managing Director | 27 Mar 1992←6 Years→20 Aug 1998 | Active | |
| J Crowther (Royton) Limited Director • Electrical Engineer | 15 Mar 1991←15 Years→8 Jul 2006 | Dissolved | |
| J Crowther (Royton) Limited Director • Unreported | 1 Jan 1970←36 Years→8 Jul 2006 | Dissolved | |
