Early career Evang finished his
examen artium in 1927, and started studying natural sciences at the
University of Oslo. As a student, Evang was a member of the radical left-wing organization
Mot Dag, and as such in opposition to military service. He contributed to the encyclopaedia project
Arbeidernes Leksikon in the 1930s, writing articles on geography and natural science. In London he was employed at the
Norwegian Ministry of Defence, working with security.
Post war Evang served as head of the
Norwegian Intelligence Service from 1946 to 1965, first as a Major, and from 1953 with the rank of Colonel. He was responsible for developing and expanding the intelligence service during the
Cold War. Evang was also a controversial person, and had conflicts both with military officers and with the head of
Norwegian Police Security Service Asbjørn Bryhn. These conflicts eventually led to his resignation in 1965. ==References==