The Soldier Artificer Company was a unit of the British Army raised in Gibraltar in 1772 to work on improving the fortifications there. It was the Army's first unit of military artificers and labourers – the existing Corps of Engineers was entirely made up of commissioned officers – and it replaced the traditional but unreliable practice of employing civilian craftsmen. The company was an immediate success and was responsible for upgrading the British fortress's defences before the Great Siege of Gibraltar.
During the siege between 1779–83, the Soldier Artificer Company played a key role in repairing the damage caused to the fortifications by Spanish bombardments. They also excavated tunnels inside the Rock of Gibraltar to enable the defenders to fire down into the Spanish lines. After the siege, they assisted in rebuilding the civilian settlement at Gibraltar. The Soldier Artificers' numbers were increased several times to a peak of about 250 men organised in two companies. Their success was such that similar units were raised back in Britain to form the Corps of Royal Military Artificers, a predecessor to today's Royal Engineers. The Soldier Artificer Company merged with the Royal Military Artificers in 1797.