TUNNELLING COMMANDER ON THE WESTERN FRONT Major Alexander Sanderson DSO, MC & Bar in Two World Wars

This biography, written by Major Alexander Sanderson’s grandson, reconstructs the extraordinary career of one of the First World War’s most accomplished military mining engineers. A New Zealand–born engineer with experience in Australian goldfields and early collaboration with figures such as H.C. Hoover and John Monash, Sanderson brought rare technical expertise to the Western Front as part of the 3rd Australian Tunnelling Company.
Operating beneath and beyond No Man’s Land near Lens, he helped wage a covert subterranean war of detection, sabotage, and counter-mining, notably at Fromelles and Hill 70, where his acute listening skills and rapid surveys neutralised German mining operations. Wounded in action and twice decorated with the Military Cross, he later assumed command following his CO’s death, overseeing extensive underground defensive systems from La Bassée to Hill 70, including the innovative Hythe Tunnel of 1918.
His career extended beyond the First World War: during the Second World War he contributed to London Underground repairs during the Blitz, advised on the Cabinet War Rooms and Churchill’s bunker, and later submitted advanced aeronautical concepts to the Air Ministry. The result is a portrait of a polymath engineer whose subterranean warfare shaped two global conflicts.