[1] Valkendorff is mentioned in 1553 as king Christian III of Denmark-Norway`s secretary and was rewarded with the 1554 Fief of Bergen for life.

He warned the government of Copenhagen about the threat against Danish economic interests that resulted from the British opening of a trade route north of Norway to Russia, avoiding the payment of Sound Dues at Helsingør.

He confiscated illegally collected taxes and made the German clergy respect the ordinance and Bergen's superintendent.

The need for support from Lübeck in an awakening conflict with Sweden made the king appoint a new fier of Bergen, called Valkendorff home to Copenhagen and open an investigation of his governance.

Augustus, Elector of Saxony mediated between Valkendorff and the king and in 1561 he was entrusted with the important task of escorting Dake Magnus to Ösel.

When Peder Oxe died in October 1575, the king initially failed to appoint a new Steward of the Realm but Valkendorff was put in charge of Bremerholm and the Nacy.

As "rent master" he delivered the dowry of 75,000 Danish dalers to James VI of Scotland, who had married Anne of Denmark in 1589.

[3] Valkendorff argued with Peder Munk about defects in the fleet that had prevented Anne of Denmark sailing to Scotland in September 1589.

For some years Valkendorff kept in the background but gradually he regained his influence and at the accession to power of the young Christian IV in 1596 he was at last appointed Steward of the Realm, a post he kept until his death.