In the sixth month of 83, Yuan An was promoted to become Grand Coachman, with the rank of one of the Nine Ministers. In the succeeding years, Yuan played an active role in discussions at court regarding the stance of the Han Empire toward the Xiongnu peoples of the northern frontier. In a conference in 85, Yuan argued in favour of a more diplomatic policy toward the Xiongnu opposed by Grand Commandant Zheng Hong () and Minister of Works Diwu Lun (). In particular, Yuan An spoke encouragingly about the practice of marriage alliances and the keeping of hostages. The next year he replaced Diwu Lun as Minister of Works and in 87 was promoted again to become Minister over the Masses.