| Company | Timeline | Status | |
| Proficuous Holdings Ltd Director • Director | 25 Apr 2025←6 Months→Current | Active | |
| Archie Parker Limited Director • Art Dealer | 3 Oct 2024←1 Year→Current | Active | |
| Parker Art Advisory Limited Director • Art Dealer | 3 Oct 2024←1 Year→Current | Active | |
| GFP Group Limited Director • Art Dealer | 3 Oct 2024←1 Year→Current | Active | |
| Lane Fine Art Limited Director • Art Dealer | 5 Dec 2019←11 Months→20 Nov 2020 | Active | |
| British Antique Dealers' Association(The) Director • Art Dealer | 9 Jul 2019←6 Years→Current | Active | |
| The Parker Gallery Limited Director • Art Dealer | 7 Sep 2015←10 Years→Current | Active | |
| The Parker Gallery Limited Director • Art Dealer | 17 Jul 2009←5 Years→27 Jul 2014 | Active | |
