He also continued his pursuit of literary works and wrote "Regarding Greenland" on the occasion of expeditions to rediscover that country.

When he terminated work at the chancery and was proceeding to Norway, he accompanied Christian Friis to the Danish Council meeting in Horsens, in late January 1609, addressing Sweden's continuing attempts to penetrate into Northern Norway Nordland and Finnmark.

From Horsens, he served as courier to convey the letters directing the men governing these northern Norwegian territories.

In 1611 he received his first fief, Rein Monastery in Rissa, near Trondheimfjord's northern shores, which fell under the crown following the Reformation.

Jens Bjelke and Steen Bille, then Governor of Trondelag, were directed to assemble 2,000 men and muster them in Jämtland.

Jens Bjelke held the office of Chancellor from 1614, was feudal overlord to Bergen from 1633, in Stavanger from 1641 and later on Elingård as well.

[2][3] On December 8, 1614 he became Chancellor of Norway and was awarded lay canon status in Oslo, together with the fief of Onsøy in Smaalenene and the Nonneseter monastic properties.

In 1634 Bjelke published the first Norwegian dictionary (Termini Juridici, english; Legal Terms).