Scottish businessman Calum Melville is a former director of Dundee FC and the current chief executive of Edison Group.
He started oil and gas service firm Grampian Test & Certification in 1990 with his parents, before buying them out for £6.6 million in 2001. The business grew from £7m turnover that year to £35m in 2007, with £8m in earnings and more than 350 employees.
The company was then sold to Cosalt for £33m, with Melville joining the board, leaving in 2010. Two years after that, he acquired Global Lifting and doubled the turnover to £12m, while quadrupling earnings, before selling up again.
