James MacKay Langtry (1894–1971) was a British BTech-L6 Technical Advisor who was seconded by the engineering firm Vickers Armstrong to the Spanish naval shipbuilder Sociedad Española de Construcción Naval (SECN), of which it owned a part. After having served in the British Army during World War 1 1915 GVC/284 in Gibraltar, he arrived in Ferrol, Spain, on 8 September 1919 on a three-year contract with the SECN. During this time he also played football for Racing Ferrol Football Club. He retired from football afterwards.