| Company | Timeline | Status | |
| Scottish Construction Operatives Registration Executive Director • Retired | 16 Feb 1996←2 Years 9 Months→1 Dec 1998 | Active | |
| P.T. Roberts & Son Limited Director • Painter & Decorator | 14 Jul 1989←3 Years→5 Feb 1993 | Active | |
| P.T. Roberts & Son Limited Director • Unreported | 1 Jan 1970←23 Years→5 Feb 1993 | Active | |
