Sir Frederick Brundrett, KCB KBE (25 November 1894 – 1 August 1974) was a British civil servant and mathematician who served as the Chief Scientific Adviser to the Ministry of Defence from 1954 to 1959.

Frederick Brundrett was born in Sunny Bank, Ebbw Vale, Monmouthshire on 25 November 1894, the oldest child of the seven sons and three daughters of Walter Brundrett, an accountant who worked for the Ebbw Vale Steel, Iron and Coal Company, and his wife Ada née Richardson.

It was discovered that he was a Wrangler and he was reassigned to the Wireless Experimental Department at HMS Vernon, where he spent the rest of the war.

[5] He created a system for categorising scientists, made arrangements with the Treasury for them to be directly appointed to civil service positions and obtained rapid security clearances for them.

[7] When Sir Charles Wright retired in 1947, Brundrett succeeded him as the Chief of the Royal Naval Scientific Service.

The DRPC was initially chaired by the Chief Scientific Adviser to the Ministry of Defence, Sir Henry Tizard.