Kammala wannan jumlar: Hansen ya kasance memba na Juri na Duniya na Horticulture a
World's Fair a St. Louis, Missouri a 1904 da kuma wakilin Amurka a Majalisar Dinkin Duniya ta farko na Genetics a London, Ingila a 1906. Ya yi aiki a matsayin sakatare na Kamfanin Horticultural na Dakota ta Kudu na shekaru da yawa. A cikin 1949, an gina abin tunawa don girmama Dokta Hansen da gudummawarsa a harabar Kwalejin Jihar Dakota ta Kudu.