Sir Stirrat Andrew William Johnson-Marshall, CBE ARIBA FRIBA (19 February 1912 – 16 December 1981) was a British architect and one of the founders of RMJM along with Robert Matthew.^[1]

Stirrat Johnson-Marshall was born in 1912 in Ajmer, India.^[2] He was the son of Felix William Norman Johnson-Marshall, a civil servant who worked abroad and his wife, Kate Jane Little. He was educated at the Queen Elizabeth School in Kirkby Lonsdale and from 1930-1935 he studied architecture at the University of Liverpool.^[3]

In 1934 he worked as an assistant at Mercalf & Metcalf and the following year he assisted the Borough of Willsden, Architect's Department. During the Second World War, he served with the Royal Engineers in Singapore.^[4] After the war he worked as Deputy County Architect in Hertfordshire County Council. In 1948, he became Chief Architect in the Ministry of Education.^[3]

In 1956, with fellow architect Robert Matthew, he established the firm of RMJM (Robert Matthew, Johnson Marshall) in Edinburgh and London.^[5] Johnson-Marshall managed the office in London. He retired from the firm in 1978 and moved to Gloucestershire.^[3]

He died on 16 December 1981 in his Bristol office.^[3]

In 1937, he married Joan Mary Brighouse, whom he had met at the University of Liverpool. They had three children.^[3] His younger brother Percy Johnson-Marshall was a British urban designer.^[6]

In 1936, he was elected ARIBA, his proposers being Lionel Bailey Budden, Leonard Holcombe Bucknell and Gilbert Henry Lovegrove.

In 1954, he was awarded a CBE. In 1964, he was elected FRIBA, his proposers being Robert Matthew, Peter Arthur Newnham and Maurice William Lee. In 1971, he was knighted.^[3]