Terrence Casey, MBE is a retired Royal Navy warrant officer 1.

He was the first person to hold the appointment of Warrant Officer of the Naval Service and was, therefore, the most senior rating of the Royal Navy.

He also served ashore at a number of shore establishments, including HMS Raleigh and others in the Plymouth and Portsmouth areas.

[1] In July 2010, Casey was appointed Warrant Officer of the Naval Service.

[3] He was appointed a Member of the Order of the British Empire in the 2013 Queen's Birthday Honours,[2][4] and was succeeded as Warrant Officer of the Naval Service in December that year by Warrant Officer Class 1 Steve Cass.