Grand Duchy of Mecklenburg-Schwerin
Born in Schwerin in the Grand Duchy of Mecklenburg-Schwerin on 11 February 1880, after school education Büsing studied law at the University of Tübingen. While at university in 1899 he was a member of the Corps Suevia Tübingen. In 1902 Büsing started his career at the Ministry of Justice, receiving his doctor of law in 1903, but after a few years switched his career to the German Foreign Office in 1910.