He served as the Marshal of the Realm between 1831–1844 and was known as the influential favourite of Charles XIV John, King of Sweden.

He is a direct descendant of Per Brahe the Younger, Lord High Steward and Governor-General.

[2] After studying at Uppsala University, he pursued a professional military career as cornet at the Royal Life Regiment Brigade's Light Dragoons Corps at 19 years of age.

He was in high favour with the French born king who had a poor command of the Swedish language.

As a politician, he reportedly remained close to his stepmother, Countess Aurora Wilhelmina Koskull, who was active within Stockholm aristocratic circles and also related to the king's mistress Mariana Koskull.