Philip Morris, the owner of the US brewing giant Miller Brewing, has undergone a boardroom shakeup, a month before new CEO Louis Camilleri takes the reins. In the move Dinyar Devitre, 54, was named as new chief financial officer while Michael Szymanczyk, 53, will become chairman of Philip Morris USA. He will be replaced as president and chief executive of the domestic tobacco business by John Nelson, 50, currently president and chief executive of Philip Morris International.