| Company | Timeline | Status | |
| The Thatcham (Old Bluecoat School) Charity Director • Forensic Scientist | 9 Oct 2018←7 Years→Current | Active | |
| Burgoyne Management Limited Director • Consulting Engineer | 12 Nov 2015←3 Years→1 Jul 2019 | Active | |
| Burgoyne Management Limited Director • Consulting Engineer | 12 Jan 2010←5 Years→30 Jun 2015 | Active | |
| Dr. J. H. Burgoyne Limited Director • Chemist | 1 Jul 2007←5 Months→7 Dec 2007 | Active | |
| Dr J H Burgoyne & Partners Limited Liability Partnership Non-designated LLP Member • Unreported | 1 Jul 2003←18 Years→1 Jul 2021 | Active | |
