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.
Büsing served in Liberia until the outbreak of the First World War in late 1914 when he signed up for active military service.
In 1918 he returned to work in the Foreign Office in Berlin, but in 1921 was appointed Consul-General in Canton until late 1923.
In November 1923 he was appointed as Consul-General to Australia, being the first German diplomat to be posted there since the war.
On 12 February 1937 Büsing received his last diplomatic appointment to Asunción as Minister to Paraguay, where he died on 20 July 1941.