Major General Gregory Stephen Smith, CB, QVRM, TD, VR, DL (born 18 May 1956) is a British businessman and retired British Army officer. He served as an officer of the Territorial Army from 1980 to 2013 and became the most senior reservist of the British Armed Forces. He served as Assistant Chief of the Defence Staff (Reserves and Cadets) from 2010 to 2013.