[1] The son of a cabinet maker, he was initially apprenticed to a joiner in Aalborg and won a silver medal for his exemplary work.
From 1894 to 1897, Dahl-Jensen studied at the Royal Danish Academy of Fine Arts in Copenhagen.
[2] Between 1901 and 1925 Dahl-Jensen modelled numerous small sculptures of beasts of prey in bronze that were exhibited at Charlottenborg, Malmö, Berlin, Munich and San Francisco, but he became increasingly famous for his work in porcelain, especially animal figurines for Bing & Grøndahl.
He was the busiest animal sculptor of his company, some of his Art Nouveau figurines are still produced by Royal Copenhagen.
In addition to animal figures, he modeled some unusual oriental figurines with deep and strong lower glazes, from 1930 to 1958.