They retained a head-hunting firm to fill the position of chief executive officer.他们聘请猎头公司帮他们寻找首席执行官的合适人选。Khan has been appointed chief executive officer.卡恩被任命为首席执行官。The company has announced the departure of its chief executive officer.该公司已经宣布了其首席执行官将离任的消息。