pousa served as ispán ("comes") of vas county in 1225. during the reign of andrew ii, he was a faithful supporter of crown prince béla, who held the title of duke of transylvania after 1226, following the agreement between the king and his son after a series of conflicts for the throne. sometime duke béla acted independently of his father, as it is demonstrated by his grant of tax exemption to transylvanian knights in 1231 and by his donation of lands situated in wallachia in 1233. pousa served as master of the treasury ("camerarius") for béla in 1225.