Sir Robert Braithwaite Marshall, KCB, MBE (10 January 1920 – 25 December 2000) was a British civil servant.
Born in Kent on 10 January 1920, the son of an officer in the Indian Civil Service, he spent large parts of his childhood in Switzerland.
He attended Corpus Christi College, Cambridge, and spent the Second World War at Bletchley Park (described as "Foreign Office temp.
appointment" in Who's Who) where his fluency in French and German were put to good use in the RAF intelligence section.
He was then Second Permanent Secretary at the Department of the Environment from 1973 to 1978 and then Chairman of the National Water Council from 1978 to 1982.