After the War, Johnson became commanding officer of the battleshipHMS Marlborough in October 1918 and was appointed a Companion of the Order of the Bath "for valuable services in command of HMS Marlborough during the operations
in Kaffa Bay, Russia" in 1919.[10][2] He went on to be Rear Admiral, Reserve Fleet in April 1921 and Admiral Superintendent Malta Dockyard in February 1924 .[11] He was promoted to vice admiral on 1 March 1926[12] and to full admiral on 8 May 1930.[13]
Grave
His grave is located at St Mary's Cemetery, Bolingbroke Grove, London.[14]