| Company | Timeline | Status | |
| Matthew F Chambers Cyber Security Ltd Director • Civil Servant | 14 Sep 2020←5 Years→Current | Active | |
| Rotherham Sailing Club Director • Civil Servant | 2 Mar 2017←4 Months→19 Jul 2017 | Active | |
| J And G Chambers Consulting Ltd Director • Accountant | 20 Dec 2016←8 Years→Current | Active | |
