Joy Business has gathered Tullow Ghana is set to have its first Ghanaian Chief Executive by August.The Chief Executive of GRIDCo, Charles Darku, is heading to the oil exploration and production firm as its new boss for Ghana.Sources say Mr. Darku will from next month be at Tullow Oil PLC to get a better understanding of the group's operations.He is however expected to formally assume office in Ghana by August. Mr. Darku is taking over from Dai Jones who is heading back to the group.Mr. Darku is an engineer by profession and has worked with the Volta River Authority (VRA) for over 27 years in various capacities.In 2009, he was appointed Chief Executive of GRIDCo.