Heinz Assmann

Captain Heinz Assmann (15 August 1904 – 15 October 1954) was a German naval officer who was a Kriegsmarine staff officer in Nazi Germany's Oberkommando der Wehrmacht (OKW) during World War II. He is notable for being present in the conference room when the July 20 plot bomb exploded in 1944 and after the war for providing his recollections of the many briefings for Adolf Hitler that he attended.

Biography
Assmann was born in Stendal in the Province of Saxony and was appointed an Admiralty staff officer in the Eastern Naval Group Command in November 1938. He then served in the Naval Operations Division and as the first officer on the battleship Tirpitz from October 1942 to August 1943. He was a general staff officer at OKW from September 1943 to May 1945.