Sir Richard Augustine Studdert Redmayne KCB MICE MIMM FGS (22 July 1865 – 27 December 1955) was a British civil and mining engineer.

Redmayne was the author of several books documenting coal mining practice in the twentieth century, one of which was acknowledged as a standard reference text for other engineers.

He received an education at Durham College of Science in Newcastle upon Tyne before being apprenticed to William Armstrong, a mining engineer, at Hetton Colliery in Pittington.

These included the committee which recommended an eight-hour day for coal workers implemented as the Eight Hour Act in 1906 and the Royal Commission into accident prevention in 1908 which also resulted in tighter safety regulations.

From 1908 to 1913 Redmayne was appointed a commissioner to inquire into mine disasters at the Hamstead, Maypole, South Moor, Whitehaven, Little Hulton, Cadeby and Senghenydd.

[1] In recognition of his work improving mine safety Redmayne was invested as a Knight Commander of the Order of the Bath in the 1914 Birthday Honours.

From 1917 to 1919 he was the chief technical advisor to the Controller of Coal Mines and in 1919 acted as an assessor to Sir John Sankey who was the chairman of the Royal Commission on Coalmines.

In 1922, during his tenure as chairman of the Imperial Resources Bureau, he became the first president of the Institution of Professional Civil Servants an office to which he was re-elected every year until his death.