Rear Admiral Martin Brian Alabaster CBE (born 10 August 1958) is a retired senior officer in the British Royal Navy.

Alabaster spent his early years in Devon, Pembrokeshire and Hampshire but for the majority of his upbringing lived in south London.

Whilst in the rank of Commander, he spent some time in HMS London as the Weapon Engineering Officer as well as acting as Naval Assistant to the Chief of Fleet Support.

He was promoted to Commodore and spent three years in the Defence Procurement Agency in Abbey Wood as the Head of Project Management.

This position made him the Royal Navy's senior officer in Scotland with representational duties everywhere north of the M4.