He passed studentexamen in 1909 and received a Candidate of Law degree from Lund University in 1913.
Winther became an attaché at the Ministry for Foreign Affairs in 1916 and served at the Swedish mission in London in 1918 and was second secretary there in 1919.
Winther was envoy in Ankara, Athens and Sofia in 1934, Moscow in 1938, Buenos Aires, Montevideo and Asunción in 1940, Prague in 1947, Madrid in 1951 and was ambassador there from 1956 to 1958.
[1] He was also representative at the International Aviation Conference in 1925, the conference for the repeal of export and import restrictions in Paris in 1929, the conference regarding the marketing of agricultural production in Paris in 1931, Bureau of International Expositions in Paris from 1931 to 1934, the International Council for German refugees in Lausanne in 1933, chairman of the Swedish delegation in trade negotiations with Czechoslovakia in 1947, and representative in trade negotiations with Spain from 1952 to 1956.
[1] Winther was also the chairman of the Association of the Friends of the Postal Museum (Föreningen Postmusei Vänner) 1958-67 and became an honorary member in 1967.