| Company | Timeline | Status | |
| Sherburn Aero Club Limited Director • Company Director | 6 Apr 2001←1 Year 7 Months→28 Nov 2002 | Active | |
| Howard Air Services Limited Director • Civil Engineer | 31 Dec 1991←33 Years→1 Jul 2025 | Dissolved | |
| R.J. Howard Engineers Limited Director • Civil Engineer | 31 Dec 1991←34 Years→Current | Active | |
| R.J. Howard Engineers Limited Director • Unreported | 1 Jan 1970←56 Years→Current | Active | |
