[1] He was also hired as the first secretary of the Norges kristelige student- og gymnasiastlag, and also founded the organization's magazine, Credo.

[3] In 1947, Wisløff was hired to head the priest's seminary at the MF Norwegian School of Theology.

He took the doctorate in 1958 on the thesis Nattverd og messe ('Communion and Mass'), which was translated into English (as 'The Gift of Communion') in 1964 and German in 1969.

He joined the executive committee of the International Fellowship of Evangelical Students in 1959, and was appointed as professor of church history at the MF School of Theology in 1961.

[1] Wisløff was known as an opponent of the World Council of Churches and liberal theology, rather adhering to a literal interpretation of the Bible.