Petrofac Limited has announced that its chief financial officer, Alastair Cochran, has advised the board of his intention to leave and take up a new role outside the group on September 1. Petrofac Limited has announced that its chief financial officer, Alastair Cochran, has advised the board of his intention to leave and take up a new role outside the group on September 1. The company revealed that Afonso Reis e Sousa, who is currently the group treasurer and head of tax, will succeed Cochran and be formally appointed as chief financial officer and executive director on the same date, “following an orderly transition period over the coming months”.