| Company | Timeline | Status | |
| Barntech Limited Director • Director | 3 Nov 2023←1 Year 11 Months→Current | Active | |
| QK Performance Ltd Director • Engineer | 10 Feb 2010←12 Years→28 Jun 2022 | Dissolved | |
| Phil Quaife Limited Director • Racing Driver | 19 Jan 2007←18 Years→Current | Active | |
