Paus left Austria-Hungary in 1918 and later became a businessman in Norway, an estate owner in Sweden, where he owned Kvesarum Castle, and finally moved to Copenhagen.
He was the brother of the businessman Christopher Blom Paus (1878–1959) and the brother-in-law of the historian of nobility Otto von Munthe af Morgenstierne.
The Austrian newspaper Die Zeit noted that "Lieutenant Thorleif v. Paus manages the consulate's business.
Rarely has a young diplomat found himself in such a responsible position as Mr. v. Paus, who will in a short time have to obtain recognition of his country from the Vienna government.
"[4] The newspaper expected him to become head of a new legation, but Norway chose to appoint Thor von Ditten as minister to Berlin with secondary accreditations to multiple countries including Italy and Austria-Hungary from 1906.
From 1906 to 1918, Paus operated his own business as an agent in Vienna, representing large Norwegian industrial companies, mainly Norsk Hydro, in Austria-Hungary.
He also inherited the manor house Magleås outside Copenhagen from his relative, count Christopher (de) Paus in 1943, but sold the property to the Catholic Church in Denmark a few years later.