| Company | Timeline | Status | |
| Singleton Birch Limited Director • Director | 1 Apr 1996←6 Years→17 Jul 2002 | Active | |
| Chemical Industries Association Limited Director • Works Manager | 5 Dec 1991←11 Months→19 Nov 1992 | Active | |
| Chemical Industries Association Limited Director • Unreported | 1 Jan 1970←22 Years→19 Nov 1992 | Active | |
