| Company | Timeline | Status | |
| Gravitricity Limited Director • Company Director | 27 Oct 2012←13 Years→Current | Liquidation | |
| Peter Fraenkel Ltd Director • Managing Director | 25 Aug 2011←14 Years→Current | Active | |
| Fraenkel Wright Limited Director • Director | 27 Jul 2011←14 Years→Current | Active | |
| Marine Current Turbines Limited Director • Energy Consultant | 1 Sep 1999←12 Years→31 Oct 2011 | Active | |
| Renewable UK Association Director • Consulting Engineer | 14 Jun 1995←4 Years→1 Sep 1999 | Active | |
| I.T. Power Limited Director • Mechanical Engineer | 15 Mar 1992←8 Years→30 Sep 2000 | Dissolved | |
