| Company | Timeline | Status | |
| Gill Southern Limited Director • Director & Design Engineer | 10 Sep 2015←10 Years→Current | Active | |
| Labcal Limited Director • Director | 30 Apr 2015←10 Years→Current | Active | |
| Gill Sensors & Controls Limited Director • Design Consultant | 7 Apr 2014←11 Years→Current | Active | |
| Gill Corporate Limited Director • Director | 13 Dec 2013←11 Years→Current | Active | |
| Gill Motorsport Systems Limited Director • Director | 3 Dec 2013←8 Years→2 Aug 2022 | Dissolved | |
| Gill R & D Ltd Director • Director | 30 Jul 2013←12 Years→Current | Active | |
| Saltmarsh Park Management Company Limited Director • Director Design Engineer Engin | 9 Jun 1997←28 Years→Current | Active | |
| Gill Research & Development Limited Director • Director | 2 Feb 1996←29 Years→Current | Active | |
| Gill Instruments Limited Director • Director Design Engineer Engin | 26 Nov 1991←33 Years→Current | Active | |
