In June 1939, Pizey was promoted to
captain. From 1939 to 1940, he commanded the
armed merchant cruiser HMS Ausonia as part of the Atlantic convoys. From 1940 to 1942, he commanded the destroyer in the Channel and North Sea, seeing action against the German battleships
Gneisenau and
Scharnhorst as well as the heavy cruiser
Prinz Eugen, for which he was appointed a
Companion of the Bath on 27 March 1942 and was also awarded a
Distinguished Service Order (DSO) and was
mentioned in despatches. In July 1942, he was given the command of a destroyer depot ship, , and served as a chief staff officer to a Rear Admiral in charge of protecting Soviet convoys in the North Sea. For this service, he was awarded a
bar to his DSO (i.e. awarded the DSO for a second time) on 27 November 1942. In December 1943, Pizey was appointed Director of Operations Division (Home) for the Admiralty, commanding
HMS President. He served in this capacity until the end of the war. ==Postwar career==