| Company | Timeline | Status | |
| R.F. Williams Consultancy Services Limited Director • Manager | 3 Jan 2014←10 Years→17 Jan 2024 | Dissolved | |
| Scandef Limited Director • Manager | 3 Jan 2014←4 Years→7 Dec 2018 | Dissolved | |
| Strathaven Ales Limited Director • Brewer | 15 Sep 1998←5 Years→1 Mar 2004 | Dissolved | |
| Heather Ale Limited Director • Brewing Supplies | 19 Apr 1994←31 Years→16 Apr 2025 | Active | |
| The Glasgow Buttery Limited Director • Director | 31 Dec 1989←35 Years→Current | Active | |
| The INN House Brewery Company Limited Director • Director | 31 Dec 1988←5 Years→31 Dec 1993 | Active | |
