20th-century Scottish engineers

Harry McShane (7 May 1891 – 12 April 1988) was a Scottish socialist, and a close colleague of John Maclean.

Robin Andrew Guthrie (born 4 January 1962) is a Scottish musician, songwriter, composer, record producer and audio engineer, best known as the co-founder of the alternative rock band Cocteau Twins. During his career Guthrie has performed guitar, bass guitar, keyboards, drums and other musical instruments, in addition to programming, sampling and sound processing.

Sir Ian Kinloch MacGregor, KBE (21 September 1912 – 13 April 1998) was a Scottish metallurgist and industrialist, most famous in the UK for his controversial tenure at the British Steel Corporation and his conduct during the 1984–85 miners' strike while managing the National Coal Board.