[1] He worked as a construction worker in the Russian Empire under Johann Beck.
[2] He took over his father's construction business in 1918 following his death, which he ran until 1946.
During this time, he was a member of the finance commission and the state committee.
[4] In 1936 he made a proposal to the Landtag for a pension scheme.
Throughout World War II, Ospelt campaigned for Liechtenstein's continued independence.