After this command Hansen was posted in 1977 to Brunssum in the Netherlands where he served as a staff officer in the Headquarters of the Allied Forces Central Europe within NATO.

Returning to Germany he then served as the department head for military-political policy in the Defence Staff in Bonn under General Inspector Jürgen Brandt.

Next Hansen was posted from October 1982 to March 1984 as the divisional head of military politics in the office of the Permanent Representative of the Federal Republic of Germany with NATO in Brussels.

When Generalleutnant Jörg Schönbohm was appointed as Secretary of State, Hansen filled the vacant post of Inspector of the Army on 18 February 1992, where he stayed until 21 March 1994.

[1] After retiring from the Army, Hansen called by Supreme Allied Commander Europe (SACEUR), ran the "Senior Mentor" seminars for "operational art" for higher NATO leadership forces as well as courses on operational planning for staff officers at the NATO School in Oberammergau.