Together with his wife, he bought 1,000,000 shares in Gulf Keystone Petroleum, which they bought in September 2008 at 20.75p per share, selling half of these in April 2010 for 85.22 pence per share. He additionally owns shares above the £50,000 registration minimum in African Minerals Ltd.
Truscott became a consultant and non-executive director working mainly with non-renewable resource extraction and public affairs companies throughout Europe and Russia. He developed a client list including Eastern Petroleum Corporation, controlled by the controversial Frank Timiş and another Timiş outfit: African Minerals, Gavin Anderson and Company, Opus Executive Partners, Gulf Keystone Petroleum Ltd, African Minerals Ltd, Landis & Gyr  and his own consultancy firm, Energy Enterprises Ltd.