| Company | Timeline | Status | |
| Caldwell Consulting Engineers Limited Director • Chartered Engineer | 21 Nov 2022←2 Years 11 Months→Current | Active | |
| Building Performance Prediction Ltd Director • Director | 28 Apr 2017←8 Years→Current | Active | |
Alan Geddis Consulting Ltd Director • Engineer | 24 Nov 2015←11 Months→1 Nov 2016 | Dissolved | |
