[1] In 1680 he was transferred to Norway to aid in the troop buildup there, and placed in command of the Akershusiske national infantry regiment.

But by late summer Vice Admiral Sehested's fleet had not appeared offshore, having been ordered by Frederick IV to return to Baltic waters.

[2] In April 1712 during the Great Northern War he was promoted to commander-in-chief (the commanding General) of the Army in Norway; he served in this position until January 1716.

[1] Gjerset indicates that, "General Hausmann, the commander-in-chief of the army, and the military member of the Slottsloven, who had proven himself both able and conscientious, and had brought the army into a high state of readiness, was dismissed shortly before the war (combat in Norway) broke out because the government feared lest his warlike spirit should lead him to act with too much haste.

[2] Hausmann was awarded a knighthood in the Order of the Dannebrog 1709 and received the title geheimeråd (one of the King's circle of closest advisers) in 1716.

Another acquisition through the marriage was of the Frogner Manor, which after his death went to his daughter Karen, who married to Frederik Christopher de Cicignon.

He owned the large Bingen log booms on the Glomma river in Sørum and controlled much of the timber supply to Christiania.