| Company | Timeline | Status | |
| R.T.Quaife Engineering Limited Director • Racing Driver | 3 Feb 2022←3 Years→Current | Active | |
| Pro-Sim Technologies Limited Director • Racing Driver | 29 Jun 2016←4 Years→22 Dec 2020 | Dissolved | |
| Quaifehobbs Promotions Limited Director • Racing Driver | 3 Feb 2007←18 Years→Current | Active | |
