Background
He was born in Trondhjem as a son of judge Hartvig Bernhard Dadhl (1841–1903) and Therese Mathilde Ellingsen (1850–1919).
He was born in Trondhjem as a son of judge Hartvig Bernhard Dadhl (1841–1903) and Therese Mathilde Ellingsen (1850–1919).
University of Oslo.
He took the examen artium in 1899 and graduated from the Royal Frederick University with the candidate.jur. degree in 1904. He settled as an attorney in Trondhjem, and from 1926 he was a barrister with access to work with Supreme Court cases. He was known as a prosecutor in Trondheim City Court.
From 1920 to 1921 he served as the Mayor of Trondheim.
He chaired the boards of Forretningsbanken, Trondhjems Mekaniske Verksted and Norske Alliance (locally), was the vice chairman of the Norwegian Bar Association and was a board member of Trondhjems Sparebank.