D.H. Griffin Companies is a group of six independently owned but integrated companies that perform contract demolition as well as environmental and site development services . It was founded in 1959 and is headquartered in Greensboro , North Carolina . They were the largest contractor responsible for cleaning up the World Trade Center after the September 11 attacks . The current president is David Griffin Jr
September 11 attacks
September 11 attacks
D.H. Griffin Companies