Johannes Marquart

In 1942, he was drafted to In 7/VI with the rank of Sonderführer, equivalent to the military rank of Major, and was put in charge of a series of courses in elementary cryptanalysis, which work he continued until 1944. He was then promoted to Government technical expert (German: Regierungsbaurat) and was given command over Referat Ia for special research. Marquart's speciality at OKH had been research on the possibility of solution of hand ciphers, and after that with the hand cyphers of foreign countries which were passed to Section Ia from the various (German: Laender) sections of Referat IV.

Marquart was educated in the Oberrealschule in Erolzheim. He then attended the University of Tübingen, Ludwig Maximilian University of Munich, University of Vienna and the Goethe University Frankfurt. From Frankfurt University in 1932, he received his degree (German: diplomierter Mathematiker) in mathematics. He was employed as Actuarial Mathematician (German: Versicherungsmathematik) until 1940, when he was employed into the Signal Corps of the Wehrmacht and Waffen SS (German: Nachrichtentruppe des Heeres). In 1940 Marquart was posted to OKH/In 7/VI as an employee (German: Angestellter) and for the first year carried out research on German hand ciphers. From 1940 to 1941, Marquart assisted Hans Pietsch, who was director of the mathematical cryptography department at In 7/VI, on hand ciphers, while working as a civilian.

Johannes Anton Marquart (born 27 September 1909 in Erolzheim in Germany) was a German actuarial and insurance mathematician. During World War II, Marquart was employed into the Germany Army Inspectorate 7/VI, in 1940, which later became the General der Nachrichtenaufklärung. He eventually became head of Referat Ia of Group IV of the organization in November 1944 engaged in research into German Army hand cryptographic systems. Prior to that period Marquart had been chief cryptanalysis in KONA 5.