De Feo retired in 2017 as executive chairman of Kennametal Inc. where he served as president and CEO. Previously, he was chairman and CEO from 1998 to 2015 at Terex Corporation, a manufacturer of lifting and material handling solutions. Chairman of the Board of Terex Corporation (a global manufacturer of equipment for the construction and mining industries) since March 1998; Chief Executive Officer of Terex Corporation since March 1995; President from October 1993 through December 2006.