Career
He assisted the geological exploration along the Greenland west coast. He is particularly renowned for his explorations of the inland ice sheet. He led an expedition that discovered nunataks now named after him: J. A. Doctorate. Jensens Nunatakker.
The geologist of the expedtition, A. Kornerup, collected no less than 27 species of Angiosperms on the nunataks.
In 1911, he changed his name to Jens Arnold Diderich Jensen Bildsøest