W. Gene Corley , P.E. was an American structural engineer and " preeminent expert on building collapse investigations and building codes . " Corley was the Senior Vice President of CTLGroup from 1987 to 2013 , where he led structural engineering projects , including numerous evaluations of buildings and structures damaged by earthquake , explosions , and from terrorist attacks . He led the investigation of structural performance of the Murrah Building following the Oklahoma City bombing in 1995 , and the World Trade Center Building Performance Study in 2001-2002 following the September 11 , 2001 attacks . He died on March 1 , 2013 . He was 77
Oklahoma City bombing
Oklahoma City bombing
W. Gene Corley