 When envoys from his father Alexander II, Simon I of Kartli, and Manuchir II of Samtskhe arrived at the Safavid court between 1596 and 1597 with many gifts, including slave boys and girls, Constantine entertained them.He served as a darugha (prefect) of the royal city of Qazvin and then of Isfahan (1602–1603).In 1604, Shah Abbas I of Persia appointed him as the governor and commander of Shirvan to fight the Ottoman forces there, and ordered him to secure the Kakhetian participation in the campaign.