| Company | Timeline | Status | |
| Sigma Office Limited Director • Electrical Engineer | 15 Mar 2012←9 Years→31 Jul 2021 | Active | |
| Erlebach Engineering Ltd Secretary • Chartered Electrical Engineer | 1 Feb 2006←19 Years→Current | Active | |
| Erlebach Engineering Ltd Director • Chartered Electrical Engineer | 10 Jun 2004←21 Years→Current | Active | |
| Erlebach Engineering Ltd Secretary • Chartered Electrical Engineer | 10 Jun 2004←8 Months→3 Mar 2005 | Active | |
