 In 1634 he was appointed Governor-General of Swedish Livonia and Ingria and Master of Horse of the Realm, and was appointed to the Privy Council of Sweden alongside several of his Oxenstierna relatives in 1641.Oxenstierna died without issue in Riga in 1643.The Oxenstierna family occupied many of the highest offices of the state during the reign of Gustavus Adolphus and Queen Christina's minority.