| Company | Timeline | Status | |
| GGKC Services Limited Director • Company Director | 9 Jul 2024←1 Year 5 Months→Current | Active | |
| Governors Place Management Limited Director • Unreported | 21 Nov 2017←8 Years→Current | Active | |
| Energeia Technologies Limited Director • Director | 11 May 2005←20 Years→Current | Active | |
| Geoff Castles Boiler Services (Ireland) Limited Director • Manager | 17 Jul 1995←30 Years→Current | Active | |
| Geoff Castles Boiler Services Limited Director • Managing Director | 17 Jul 1995←30 Years→Current | Active | |
