GT Advanced Technologies Inc. (GT) announced that it has appointed Greg Knight as CEO, effective September 15, 2016. GT's board of directors has accepted the resignation of the previous CEO, Dave Keck. Knight, a member of the GT board, has extensive PV industry experience, with leadership positions at various companies, including GT, where he was the director of process engineering during GT's rapid expansion in the PV industry between 2006 and 2010. Most recently, he was founder and CEO of Exawatt and PV Tech Group.