George William Casey, Jr. (born July 22, 1948) is a retired United States Army General who last served as the 36th Chief of Staff of the United States Army from April 10, 2007 to April 11, 2011. Casey previously served as Commanding General, Multi-National Force – Iraq from June 2004 to February 8, 2007 and had been in the Army for his entire adult working life. He now resides outside of Boston.