LUANDA (Reuters) - Isabel dos Santos, the billionaire daughter of President Jose Eduardo dos Santos, pledged a root and branch overhaul of state energy firm Sonangol on Monday to improve its efficiency and margins to offset the "huge" impact of depressed oil prices.
A presidential decree carried on Angolan state media last week said Isabel dos Santos, ranked as Africa's richest woman by Forbes magazine, would become chief executive after the firing of Sonangol's board.
