| Company | Timeline | Status | |
| Muirhead Aerospace Limited Director • President - Electronic Instruments | 3 Nov 2008←16 Years→20 Jun 2025 | Active | |
| Aem Limited Director • Snr. Vice President - Aerospac | 1 Nov 2007←17 Years→20 Jun 2025 | Active | |
| Airtechnology Pension Trustees Limited Director • Snr Vice President Aerospace | 16 Feb 2005←12 Months→13 Feb 2006 | Active | |
Aircontrol Technologies Limited Director • Snr Vice President Aerospace | 16 Feb 2005←12 Months→13 Feb 2006 | Dissolved | |
| Ametek Airtechnology Group Limited Director • Snr Vice President Aerospace | 16 Feb 2005←12 Months→13 Feb 2006 | Active | |
