Douglas Earle Marsh (1862–1933) was an English railway engineer, and was the Locomotive, Carriage and Wagon Superintendent of the London, Brighton and South Coast Railway from November 1904 until his early retirement on health grounds in July 1911.
[1] Marsh succeeded R. J. Billinton as the Locomotive, Carriage and Wagon Superintendent at Brighton Works on 23 November 1904.
In 1907 he introduced an example of the Schmidt superheater on one of his LB&SCR I3 class locomotives, with dramatically improved results.
Whilst at Brighton he abolished the Stroudley yellow livery for passenger locomotives and removed the names from them.
He resigned on the grounds of deteriorating health in July 1911, following accusations of a number of irregularities in his accounting.