Surgeon Vice-Admiral Alasdair James Walker, CB, OBE, QHS, FRCS (22 June 1956 – 1 June 2019) was a British medical doctor and senior Royal Navy officer.

[2] Walker went on to be Director of Medical Policy and Operational Capability for the Surgeon General in 2011 and, promoted to rear admiral, he became Director Medical Policy and Operational Capability at the Ministry of Defence as well as Assistant Chief of the Defence Staff for Health in July 2014.

In December 2015, he was promoted to vice admiral and appointed Surgeon-General of the British Armed Forces.

[3][4] He was appointed Companion of the Order of the Bath (CB) in the 2017 Birthday Honours.

[5] Walker retired from the Royal Navy as a surgeon vice-admiral on 1 May 2019.