Amcor announced that Roelof Westerbeek, president Amcor Flexibles Asia Pacific is leaving the company to pursue other opportunities.   Effective immediately, Michael Zacka, chief commercial officer, will assume the role of president Amcor Flexibles Asia Pacific, in addition to his current responsibilities. Zacka joined Amcor in July 2017 from Tetra Pak, where he spent 20 years leading businesses around the world including, most recently, as head of South Asia, East Asia and Oceania....