On Aug. 30, British oilfield services company Petrofac Ltd. appointed Alastair Cochran, a former BG Group executive, as the head of its finance department.

Cochran, who oversaw BG's integration with oil major Royal Dutch Shell Plc (NYSE: RDS.A), would replace Tim Weller as CFO and executive director at the company's October board meeting, Petrofac said.

Weller is set to move to security provider G4S Plc in October, becoming its CFO.