| Company | Timeline | Status | |
| Becca Holdings Limited Director • Furnace Engineer | 8 Nov 1991←33 Years→29 Sep 2025 | Active | |
| Knight Site Services (U.K.) Limited Director • Furnace Engineer | 15 Jul 1991←32 Years→19 Dec 2023 | Dissolved | |
| Firbeck Construction Limited Director • Furnace Engineer | 31 May 1991←8 Years→29 Nov 1999 | Active | |
| S. H. L. Refractories (U.K.) Limited Director • Furnace Engineer | 31 May 1991←34 Years→29 Sep 2025 | Active | |
| Markham (Sheffield) Limited Director • Furnace Engineer | 31 May 1991←34 Years→29 Sep 2025 | Active | |
